Extracurricular event in chemistry "club of chemistry experts". Methodological development of extracurricular activities in chemistry Extracurricular activities in chemistry and social studies

Conducted among students in grades 8-11.

The purpose of the event: broadening the horizons of students, stimulating motivation to study chemistry through practical work, through entertaining experiments, quizzes, which, in turn, contribute to the development of students’ creative abilities.

A team of participants consisting of 4 people is formed from each class. Teams are given the task of preparing a name, introducing teams, and addressing the jury and opponents.

1. Team “Chemists”;

2. Motto: “We cannot imagine the pain of gnawing on the granite of chemical science”;

3. Address to rivals: “Yes, our opponents are strong, but for us you are not scary. We have been “chemist” since an early age, this is our big secret!”;

4. Appeal to the jury: “It won’t be difficult for you to judge, it’s impossible to make mistakes: it’s better than us, believe me! The whole world knows this!”

1. Team "Diamond";

2. Motto: “No one in nature is harder than us, because we are diamond”;

3. Address to opponents: “You will have to sweat! We are too tough for you”;

4. Appeal to the jury: “You judge fairly, think slowly, and when giving us marks, add one point!”

1. Team "Acid";

2. Motto: “We, acids, have a huge system - hydrogen is to blame for this”;

3. Appeal to rivals: “Run away in all directions!” We are a team – “Acid”;

4. Appeal to the jury: “We will not argue with you: the first place is ours.”

1. Team "Ferrum";

2. Motto: “It’s not enough to be iron, you have to be useful!”;

3. Address to rivals: “We are spirited guys, as strong as iron. We do not wish you troubles, but we wish you victories”;

4. Appeal to the jury: “We welcome the jury, therefore we are not in poverty.”

The club meeting has a somewhat theatrical form. The action takes place on the site of the royal palace of the ruler of the Chemical Kingdom of Amalgam III. The leading manager is the court Master of Chemical Sciences Bertollet.

Characters:

Queen of the Chemical Kingdom - Her Majesty Amalgam III(high school student)
Court Master of Chemical Sciences Berthollet(a high school student who will play the role of presenter).
Members of the Academic Council (jury)- high school students, subject teachers. Each of them (according to seniority) receives the title “Chief Advisor”, “First Advisor”, “Adviser on Historical Issues”, etc.
Guardian of time and truth- a student who will monitor the teams’ compliance with the rules of the game and time limits.

The role of each participant in the performance is played out by costumes: the Queen will have a crown on her head, the Master will have a master’s cap, the members of the academic council may simply have corresponding signs in front of them, and the Guardian will have a stopwatch in his hands.

Progress of the game

(Fanfare sounds. The Master enters.)

Master. Today we have gathered here to put the best students of our city to the test and answer the question: “Are they worthy of becoming the best chemists of a great chemical country?” This country is ancient and magical, keeping many mysteries. No one has yet been able to guess many of them! Only the smartest, bravest and most persistent this country reveals its secrets. So, let's begin! Her Majesty Queen Amalgam III is the brilliant ruler of a chemical country. Everyone stand up!

(The Queen enters and sits down.)

Queen. Good afternoon, my faithful subjects. Hello, Master. Today is a significant day for our state. We will be happy to award the title of best chemists to the most worthy of those present. Only for this you will need to pass a series of tests. Are you ready to show miracles of ingenuity, courage and brilliance of mind in order to earn in a fair fight the right to become a citizen of my magnificent country? Do you promise to fight honestly, without deception? I ask you, dear advisors, to become unbiased judges and evaluate teams fairly.

Master. What if even members of the academic council cannot answer some questions?

Queen. Then we will have to turn to the guardian of time and truth.

(The Guardian stands up and bows. He holds a large book and a large watch in his hands.)

Master. So can we start?

Queen. Get started! But first I would like to get to know the teams. Let them introduce themselves to us. This will be their first task.

Master. So, the first competition is the presentation of teams.

(The first competition is underway, the jury members give marks (but on a five-point scale), and announce the results.)

Queen. So, we met the teams. However, people who do not know the history of their country cannot become the best chemists.

Master. Your Majesty, you are absolutely right. That is why we assigned the History Advisor in advance to prepare questions for the teams to find out whether the tournament participants are familiar with the historical figures of our country.

Queen. Okay, Counselor, you can begin.

History Advisor. Dear tournament participants!

The stage takes place in the form of an auction. The maximum number of points a team can score is 10, provided that at the first prompt they name the name of the chemist. When using the second clue - 9 points, and so on until 0. The team representatives draw the very first clue themselves. Those who follow are called Advisors.

Nikolai Nikolaevich Zimin.

10 points. This Russian scientist was born on August 25, 1812 in the city of Shusha, Elizavetpol province. Having lost his parents, he was left in the care of two older sisters from an early age.

9 points. While studying at Kazan University at the Faculty of Physics and Mathematics, this man, demonstrating brilliant abilities in mathematical sciences and astronomy, attracted the attention of professors and the rector of the university N. I. Lobachevsky.

8 points. During his long overseas business trip to Berlin, he studied mathematics, listened to lectures by the famous physiologist and anatomist I. Müller, studied with the physiologist and histologist T. Schwann, and was also interested in medicine, visiting clinics and hospitals for this purpose.

7 points. In St. Petersburg, on October 26, 1868, the Russian Chemical Society was formed, and this man was unanimously elected president.

6 points. The Russian Chemical Society, in commemoration of the memory of this scientist and another outstanding Russian chemist A. A. Voskresensky, who died in the same year, established a prize, which was given out every four years, for the best independent work in chemistry performed in Russia by young Russian chemists.

5 points. Portrait demonstration.

4 points. Among the many students of this man there were two wonderful chemists - A. M. Butlerov and A. P. Borodin.

3 points. The reaction named after him marked the beginning of the development of the aniline dye industry in Russia.

2 points. The famous scientist A.-V. Hoffmann, having received information about the death of this man, ended his speech at a meeting of the German Chemical Society with the words: “If... he had done nothing more than convert nitrobenzene into aniline, then even then his name would have remained inscribed in golden letters in the history of chemistry.” .

1 point. The famous transformation discovered by these scientists: the production of aniline from nitrobenzene.

Mikhail Vasilievich Lomonosov

9 points. At the age of 19 he left to study.

8 points. From 1731 he studied at the Slavic-Greek-Latin Academy in Moscow, from 1735 at the Academic University in St. Petersburg, in 1736-41 in Germany.

7 points. On his initiative, Moscow University was founded (1755).

6 points. Developed atomic-molecular science.

4 points. He described the structure of the Earth, explained the origin of many minerals and minerals. He emphasized the importance of exploring the Northern Sea Route and developing Siberia.

2 points. He revived the art of mosaic and the production of smalt, and created mosaic paintings with his students.

1 point. Member of the Academy of Arts.

Alexander Mikhailovich Butlerov.

10 points. He was born on September 6, 1828 in the city of Chistopol, Kazan province and, having lost his mother early, was raised in the family of his grandparents.

9 points. His first teachers at Kazan University were N. N. Zinin and K. K. Klaus. Under their guidance, he received excellent laboratory training.

8 points. In the presentation of this scientist to the Department of Chemistry of St. Petersburg University, Dmitry Ivanovich Mendeleev wrote: “...one of the greatest Russian scientists. He is Russian both in his scientific education and in the originality of his works. A student of our famous academician N.N. Zinia, he became a chemist not in foreign lands, but in Kazan, where he continues to develop an independent chemical school... In chemistry, there is his school, his direction.”

7 points. After defending his doctoral dissertation, this scientist undertakes a long business trip abroad to broaden his horizons. Over the course of a year, he visits all the best European laboratories, listens to lectures by outstanding chemists and meets with the most prominent representatives of Western European chemical science; speaks four European languages.

6 points. This scientist took an active part in the development and strengthening of women's higher education in Russia. He said: “We must strive to ensure that in every university city there are not only higher women’s courses, but women’s departments of universities, and in all faculties.”

5 points. Portrait demonstration.

4 points. Since 1871, this scientist was a member of the Free Economic Society. His work in this society is especially well-known and fruitful in the development of rational beekeeping in the country. His work “The Bee” was published by the Society, and the Society awarded an honorary award for this work. His brochure “How to Keep Bees” was especially successful.

3 points. This scientist initiated the cultivation of tea in the Caucasus. Having discovered wild tea bushes near Sukhumi, he founded the first tea plantation in the Caucasus.

2 points. During the period of the highest rise of his creativity, he wrote his famous textbook “Introduction to the complete study of organic chemistry.” The first edition of this textbook was published in Russian in 1864. This was followed by its translation into German, which greatly contributed to the dissemination of the theory of the chemical structure of organic substances among foreign chemists.

1 point. His famous theory of the structure of organic compounds stated:

carbon has four affinity units;
four carbon affinity units are equivalent;
carbon atoms, connecting with each other, can form chains;
Carbon atoms, connecting with each other, can form double and triple bonds and rings.

Dmitri Ivanovich Mendeleev.

10 points. He was born on February 8 in the city of Tobolsk in the family of the director of a local gymnasium and was the seventeenth child in the family.

9 points. He can rightfully be considered the father of the chemicalization of domestic industry and agriculture. Based on a detailed study of the raw material fuel base of Russia, he published a number of chemical-economic studies and articles on the need to increase the domestic coal and oil production.
noi industry.

8 points. Working in Germany, he carried out his remarkable studies of the phenomena of capillarity, expansion of liquids and the “absolute boiling” temperature. He was the first to establish the existence of a critical boiling point for liquids, which had a huge impact on the subsequent development of ideas about gases and liquids.

7 points. This scientist conducted numerous studies on the compressibility of gases, the resistance of liquids, studied solutions, studied meteorology and issues of aeronautics. In connection with his latest work and wanting to explore the upper layers of the atmosphere, in 1887 he alone, without a pilot, ascended in a balloon to observe a solar eclipse.

b points. This scientist took an active part in the publication of the “Encyclopedic Dictionary” of Brockhaus and Efron, editing its chemical-technological and industrial sections and acting as the author of a number of articles.

5 points. Portrait demonstration.

4 points. In 1865, he defended his dissertation on the topic “On the combination of alcohol with water.”

3 points. In his work “Fundamentals of Chemistry,” he was the first to generalize and systematize a huge number of disparate chemical facts and observations, laying the foundation for the building of modern chemical science.

2 points. His famous law states: “The properties of the elements and their compounds are periodically dependent on the atomic mass of the elements.”

1 point. Demonstration of the table “Periodic table of chemical elements by D. I. Mendeleev.”

Vladimir Vasilievich Markovnikov.

10 points. This scientist was born on December 22, 1838 in the village of Chernorechye near Nizhny Novgorod in the family of an officer.

9 points. Already a famous scientist, he began to study the composition of Caucasian oil. In his article “Study of Caucasian oil”, published by him together with V.N. Oglobipy in 1883, he comes to the conclusion that the main part of Baku oil (up to 80%) is hydrocarbons, called “paphteia” by the authors. Subsequently, this group of hydrocarbons was called “aromatic hydrocarbons”, or “arenes”. For this and other work in the field of studying Caucasian oil, the International Petroleum Congress awarded this scientist a gold medal in 1900.

5 points. He was not a scientist confined to his specialty. He was interested in issues of mineral chemistry and geology. He was keenly interested in the problem of the origin of Glauber's salt in the Volga salt lakes and the question of the origin of the salt lakes themselves.

7 points. While teaching chemistry at Moscow University, his laboratory was one of the first Russian laboratories to open its doors to women. Among the first works to come out of this laboratory was the work of Yu. V. Lermontova “On the production of normal propylene bromide.”

6 points. He was the first and most talented student of the famous Russian chemist A.M. Butlerov. With the consent of the teacher, while still studying at Kazan University, he published a lithographed course of his lectures on organic chemistry.

5 points. Portrait demonstration.

4 points. During the Russian-Turkish War of 1877-1878, this scientist developed extremely intensive activities in organizing sanitary assistance for the army in the field, and worked on drawing up “Instructions for the disinfection of hospitals, ambulance trains and battlefields.” And during the outbreak of the “chicken plague” in 1878, he, together with Dr. Otradninsky, published the popular brochure “The Plague in Russia” and at the same time compiled a “Practical Guide to Disinfection.”

3 points. The main direction of his theoretical and practical research was the study of the mutual influence of atoms in the molecules of substances.

2 points. The reaction of addition of hydrogen halides to unsaturated hydrocarbons obeys the well-known rule named after him.

1 point. “When unsymmetrical alkenes undergo hydrohalogenation, the hydrogen atom is directed to the more hydrogenated carbon atom, and the halogen atom is directed to the less hydrogenated carbon atom.” Who is the author of this rule?

(while members of the academic council are counting points, performance by members of the “Entertaining Experience” circle)

1 assistant master. And now, friends, a story for you. At night or in the morning, the townspeople were sleeping early, when suddenly a flame appeared from the crater of the volcano. The roar and roar of lava flowing through the vent. So the glorious city perished under lava and ashes. I will show you, as best I can, the death of the city of Pompeii.

To the lab. The stand strengthens the test tube with ammonium dichromate. Lightly heat the bottom of the test tube using an alcohol lamp.

1 assistant master. You guys will remember this eruption. What type of reaction is here?

Master. Decompositions!

Queen.

Well, advisers, what are the results?
Who was the best and who was worse?
We really need to know about this!

(members of the academic council announce the results of the first competition)

Queen. Yes, now I'm calm. These people know the history of my state. Maybe someday their names will be included in the annals of the country. Well, how are they doing with solving chemical mysteries? Do they have enough knowledge and ingenuity to recognize substances and elements by describing their properties?

Master. I think, Your Majesty, this can be verified. Let's ask our First Advisor to conduct a test for the tournament participants.

Queen. Certainly. Did you hear, Advisor?

First Advisor. Yes, Your Majesty. I am always ready to serve you.

Queen. Then explain the terms of the competition to the participants and get started!

First Advisor. Teams will be asked 6 questions. All answers must begin with the letter “K” or “S” (by lottery)

Questions for the first team:

A sulfur compound that has the smell of rotten eggs. (hydrogen sulfide)
Toxic fog? (smog)
She was born in water, but it was a strange fate. She is afraid of water and always dies in it. (salt)
From what metal should 1/3 be cut off to form a known bone? (silver – edge)
General name for silicic acid salts. (silicates)
Heating device. (alcohol lamp)

Questions for the second team:

What is burnt sugar called? (caramel)
Most common chemical element? (oxygen)
What are the names of substances that accelerate a chemical reaction? (catalysts)
Chemical vessels. (flask)
Common name for chalk, marble, limestone? (calcium carbonate)
What is the name of the solution formed when starch is heated with water? (paste)

Questions for the third team:

An element of group VI, known to people since ancient times? (Sulfur)
Almighty oxidizer (If you just give me some firewood). (Oxygen)
Salts of carbonic acid. (carbonates)
Chemical element sign. ( Symbol)
A sign by which one substance differs from another. ( property)
A third-period element that has four electrons in its outer shell. (silicon)

Questions for the fourth team:

Is the development of the country's chemical industry judged by the production of this substance? (sulfuric acid)
What non-metal is more valuable than gold, and they pay money to get rid of it? (carbon - soot)
Destruction of metal under the influence of the environment? (corrosion)
What are clay products called? (ceramics)
Positively charged ion. (cation)
A reaction in which two or more substances form one complex substance. (compound)

Questions for the fifth team:

An element with the Latin name “argentum”. (silver)
Chemical bond in a water molecule. (covalent)
What is the name of the Russian scientist who obtained aldehyde from acetylene? (Kucherov)
What is the name of the fuel used to fuel airplanes? (kerosene)
A heavy metal that causes poisoning of brain cells. (lead)
What is another name for the reaction of combining substances? (synthesis)

Queen. Thank you, Advisor. I made sure that these students know the people of my country well. And they are all right with their ingenuity. And now I want to offer them my task. Our state is magical. Only the best chemists know the secrets of magic. My courtiers accidentally mixed sand, salt, wood and iron filings. Here is my royal order: “Within seven minutes, divide this mixture into its components!” You can invite one eighth-grader to help. And while you are practicing your craft, the master's assistants will show you their tricks.

1st assistant:

It's hot here! I'm thirsty!
Who should I ask for water?

2nd assistant:

I would drink a lot
Sodas without syrup.

3rd assistant:

Oh, I love it with syrup!
Just a little bit!

4th assistant:

Brothers! I need a cow -
I want fresh milk!

It turns out 5 assistant, who has a large flask with liquid in his hands:

Are you guys thirsty?
There is a fabulous liquid in the flask.
I can handle miracles
I'm studying chemistry!
Put up the glasses!
The experiment was carried out accurately
Everything is going according to plan!

(Pours liquid into beakers)

Here's water, here's soda, here's fresh milk.
It turned out very cleverly, and the secret is easy to find out!

(The guys pretend that they want to drink the contents of the glasses)

Stop, guys, wait, so there won't be any trouble,
Please don't drink any syrup or water.
There are serious prohibitions in this strict state.
Remember, friends, you can neither eat nor drink here!

5th assistant: The first miracle happened, what was in the glasses?

1st assistant: And the answer is quite simple - my glass was empty.

2nd assistant: I have soda in my glass.

3rd assistant: Along with it - methyl orange.

4th assistant: Mine contains barium chloride.

5 assistant What does this mean? It won’t be difficult for us to understand what’s in the flask...

Audience: Acid!

Queen. Before you go Next, listen to the Hindu parable that the famous Russian director K.S. loved to tell. Stanislavsky. The Maharajah chose his minister. He announced that he would take the one who would walk along the wall around the city with a jug filled to the top with milk and not spill a drop. Many walked, but along the way they were distracted and spilled milk. But then he went alone. Around him they shouted, shot, frightened and distracted him in every possible way. But he didn't spill a drop. “Did you hear screams, shots?” - the Maharaja asked him. - “Did you see how they scared you?” “No, sir, I was looking at the milk.” Not hearing or seeing anything extraneous, this is the extent to which attention can be concentrated. Now let's check how attentive you are.

Second advisor!

Second advisor. Yes, Your Majesty.

Queen. Explain the terms of the competition to the participants and get started!

Second advisor. I obey. Each team receives three puzzles. You need to solve them within five minutes. The Guardian will keep track of time.

Master: I’ll show you my magic for now. Smile quickly, smile more cheerfully. We are opening our photo studio today. I can instantly get your photo, without a camera (invites the viewer).

Look carefully at this blank sheet
Smile more cheerfully - this is a must.
We can easily develop this photo:
Spray the leaf a little from a spray bottle.

(Experience "Image not made by hands" On a thick sheet of paper, draw in advance the contours of a human figure with a brush using the following solutions: face and hands - ammonium thiocyanate NH 4 CNS; clothing - tannin; hair - yellow blood salt.

After the sheet has dried, spray it with a solution of iron (III) chloride from a spray bottle. An image of a man in black clothes with a red face and hands, with blue hair appears on the paper.

Iron (III) chloride with ammonium thiocyanate forms a red complex salt (hands and face); with yellow blood salt – blue complex salt (hair); with tannin – black complex salt (clothing).)

Master: Here’s another entertainment: who will give his hand to be cut off? It’s a pity to cut off a hand, then the patient is needed for treatment (viewer is invited). Addresses to the assistant: you will be an assistant.

Master: We will operate without pain, although there will be a lot of blood.

Master: Every operation requires sterilization. Help assistant, give me iodine. We will moisten it generously with iodine so that everything is sterile. Don't move around, patient, give me the knife, assistant. Look, blood is flowing in a trickle, not water. But now I wipe my hand - there’s not a trace of the cut.

(Experience "Lots of blood without wounds" Anyone from the audience wipes their hand with a cotton swab moistened with a solution of FeCL 3 (we can say that this is iodine), then take a dull knife, dip it, as if for disinfection, into a solution of potassium thiocyanate KCNS or ammonium NH3CNS and run it over the hand treated with ferric chloride (III ). At the point where the knife comes into contact with the skin, a “blood” streak instantly appears (rhodanic iron is formed). It seems that the hand was cut and blood appeared. Then, using a cotton swab soaked in a solution of sodium fluoride NaF, swab over the “cut”. The “wound” instantly disappears. Sodium fluoride discolors rhodane iron.)

(The first advisor announces the results)

Master. Well, Your Majesty, are you satisfied with the competition?

Queen. Yes, Master. And now we will offer the last test. Third Advisor!

Third Advisor. Yes, Your Majesty.

Queen. Explain to the participants the conditions of the last competition.

Third Advisor. I obey! Each team receives a black box. In this box there are notes with individual words from the definition and empty pieces of paper. You need to create a definition and write this concept on a blank piece of paper. Let's see which team can do it the fastest!

1. A simple substance is a substance consisting of atoms of different chemical elements.

2. Oxides are substances consisting of two elements, one of which is oxygen.

3. Acids are complex substances containing hydrogen that can be replaced by metal.

4. Indicators are substances that change their color in solutions of acids and alkalis.

Queen. Our chemical country is fair. Master!

Master. Yes, Your Majesty!

Queen. Check the knowledge of other residents of our country.

Master. I obey, Your Majesty! Now we will solve chemical riddles.

I am, friends, everywhere:
In minerals and in will.
Without me you are like without hands:
There is no me - the fire has gone out. (Oxygen)

I'm shiny, light grey,
I form chlorophyll
And I'm the first photographer
I really liked setting fires! (Magnesium)

I am irreplaceable metal,
Much loved by the pilot,
Lightweight, electrically conductive,
And the character is transitional. (Aluminum)

A man loves me!
I have named a whole century!
I'm shiny and red
Very good at alloys! (Copper)

I am the luminous element.
I'll light matches for you in a moment.
They will burn me - and under water
My oxide is a staten acid. (Phosphorus)

I warn you in advance:
I'm unbreathable!
But everyone doesn’t seem to hear
And they constantly breathe on me. (Nitrogen)

I have a bad reputation:
I am a known poison.
Even the name says
That I'm terribly poisonous. (Arsenic)

In the distant mountains of Shao Lin
They dug clay - kaolin.
From this clay from a long time ago
Made in China... (Porcelain)

This is my nature:
Limestone, sand and soda,
They require a lot of fire,
To melt me down
I am transparent and light
And my name is... (Glass)

I inform you: I'm in a hurry!
I live while I write.
I covered the whole board with white...
I'm disappearing. I was... (Chalk)

Queen. Yes, Master! I was once again convinced that the people of my country know chemistry well. I will ask the Council to sum up the results of the team competition and tell us the winner. And while they are conferring, please, dear Berthollet, show us some of your miracles.

Master. With pleasure, Your Majesty. I'll ask the assistants to bring me a tray!

(Music sounds. Assistants take out equipment.)

master (slowly casting spells):

They often say, friends,
That there is no smoke without fire.
I will strike you now:
Here it is smoke, but there is no fire!

(In a porcelain cup there is cotton wool moistened with an ammonia solution. The Master brings a “magic wand” to the cotton wool - glass rod wrapped in cloth, the tip of which is soaked in concentrated hydrochloric acid.)

Magic surrounds us
Surprising, amazing.
Touch with a magic wand -
The fire is lit!
I can do without matches
In getting fire! Once!

(Dips the stick into concentrated sulfuric acid.)

(The moistened stick is dipped into crystalline permanganate potassium.)

(Quickly presses the stick onto cotton wool soaked in medical (96%) alcohol.)

Fire, burn!

Magic surrounds us
Surprising, amazing.
On a flower
We'll splash water
Miracle! He's blooming!

(“Magic Flowers” Paper flowers made from white corrugated paper are pre-moistened with a phenolphthalein solution. After pronouncing the “magic phrase”, they are sprayed with an alkali solution from a spray bottle, as a result of which the flowers acquire a crimson color.)

Master. Your Majesty, these flowers are for you!

Queen. Thank you, Master. And now I will ask the members of the Academic Council to announce the results.

The results of the competition are summed up. The Queen presents medals to the winners and active fans.

Queen. So, you have proven that you really deserve to bear the title of “Experts” of our chemical country. I congratulate you. I was very pleased to meet you. Bye for now.

Purpose of the event:

In a playful way, repeat the most important questions of the 9th grade chemistry course;
Arouse interest in the subject, broaden the horizons of students;
Develop creative abilities.

Preparation for the game: two teams (6 people each) from parallel classes, assistants, jury (high school students); “black hat”, a clock with a second hand, puzzles with chemical content, five numbered test tubes: sugar, salt, flour, starch, soda, washing powder.

Leading: Good afternoon, guys and guests! We are glad to see you at our “Happy Occasion”. Today teams from grades 9a and 9b meet. A word to the teams for presentation: names, comic parameters (total weight, height), hobbies.

In addition to the winning team, the most active spectator and the best player will be chosen by the decision of the presenter and assistants.

Each team answers questions in 1 minute.

What physical bodies are made of. (Substances).
Chemical phenomena. (Chemical reactions).
The smallest particle of a substance that retains its chemical properties. (Molecule).
A certain type of atom. (Atom).
The most common oxidation state of hydrogen in compounds. (“+1”).
Conventional notation of a substance using signs and indices. (Chemical formula).
One of the domestic authors of atomic-molecular science. (M.V. Lomonosov).
What particles are located at the nodes of the crystal lattice of substances with a non-molecular structure? (Atoms, ions).
Recording chemical reactions using chemical symbols and formulas. (Chemical equation).
A reaction in which one complex substance produces several simpler substances. (Decomposition reactions).
A unit of measurement for the amount of a substance. (Mole).
The mass of one mole of a substance. (Molar mass).
A reaction in which two or more substances form one complex substance. (Compound reactions).
Name the substance Na 2 SO 4. (Sodium sulfate).
Table salt formula. (NaCl).
The science of substances and their transformations. (Chemistry).
Signs by which substances differ from each other or are similar to each other. (Properties).
Separation of mixtures using a filter. (Filtration).
The smallest chemically indivisible particle. (Atoms).
Substances formed by atoms of the same type (Simple).
A value indicating how many times the mass of an atom is greater than 1/12 the mass of a carbon atom. (Relative atomic mass).
The number of atoms in a molecule. (Index).
The mass of a molecule, expressed in a. e.m. (Molecular mass).
Conditional charge of an atom in a compound. (Oxidation state).
Name the substance Na 2 S. (Sodium sulfide).
Avogadro's number. (6.02 10 23).
Are all substances made of molecules? (No).
Molar volume of gases at N. u. (22.4 l/mol).
Chemical bond in sodium chloride. (Ionic).
The hardest substance in nature. (Diamond).
The oxidation state of oxygen in H 2 O 2. (-1).
What vodka will the “bitter” drunkard not drink? (Royal - a mixture of nitric and hydrochloric acids).
The name of a mixture of 2 volumes of hydrogen and 1 volume of oxygen. (Detonating gas).
What acid is in the human stomach? (Salt).
Two simple substances found in nature in a liquid state. (Mercury, bromine).
A chemical element that has no neutrons in its nucleus. (Hydrogen).
What kind of water becomes muddy from breathing? (Calcareous).
The lightest inert gas. (Neon).
A chemical element with 3 protons in its nucleus. (Lithium).
A colorless gas with the smell of rotten eggs, heavier than air, explosive when mixed with air. (hydrogen sulfide)
Gas used in the production of mineral water and carbonated drinks. (Carbonic).
This gas was discovered by the German scientist Paracelsus in the 16th century when he immersed an iron nail in a solution of sulfuric acid. (Hydrogen).
What noble metal with high malleability can be blamed for the extermination of an entire tribe? (Gold).
Under normal conditions, halogen is a dark purple, almost black substance. (Iodine).
Electrons that, when moving, form dumbbell-shaped clouds. (p – electrons).
Charged particles into which atoms are transformed as a result of the loss or gain of electrons. (Ions).
Chemist who introduced modern designations for chemical elements. (J. Berzelius).
A method of separating liquids based on differences in boiling points. (Distillation).
Substances whose solutions or melts conduct electric current. (Electrolytes).
The breakdown of an electrolyte into ions when melted or dissolved in water. (Dissociation)

Mysterious pause.

The presenter offers riddles to the audience.

Nitro paint, nitro varnish,
Ammonia and ammonia
Air, nitroglycerin,
Both nylon and aniline -
Everything contains “nitrogen”.
Who is he, or rather “en”?

(Nitrogen)

This miracle mineral
Vice Admiral in the world,
Chief cook in a restaurant
And the executioner is on a fresh wound.

(Halite)

It's in white sand and quartz
Composed of glass and alloys,
And if it gets into the rubber,
Heat resistance and
Gives it frost.

(Silicon)

He is everywhere and everywhere:
In stone, air, water,
He is in the morning dew,
And in the heavenly blue.

(Oxygen)

Foul element.
How does the substance cause burns?
But it is beneficial when
They use it like salt in hospitals.

(Bromine)

All living things consist of me.
Graphite, anthracite and diamond.
I'm on the street, at school, and in the field,
I am in the trees and in each of you.

(Carbon)

II game. "A dark horse".

Leading. Our “Dark Horse” is a substance that is very common in nature, but practically never found in its pure form. It's an oxide, but no one calls it that. Without this substance, life is impossible. Among ancient peoples it was considered a symbol of immortality and fertility. Lao Tzu claimed that this is “the softest and weakest creature in the world, but in overcoming the hard and strong she is invincible and has no equal in the world in this.” In general, this is the most extraordinary liquid in the world. (Water).

Comic pause.

Assistants offer to those present

Rules for survival in a chemical laboratory:

If you uncork something, cork it.
If you have liquid in your hands, don’t spill it; if you have powder, don’t scatter it; if you have gaseous, don’t let it out.
If you turned it on, turn it off.
If you opened it, close it.
If you took it apart, reassemble it.
If you can’t assemble it, call a craftsman for help.
If you haven’t taken it apart, don’t even think about putting it back together.
If you use anything, keep it clean and tidy.
If you want to use something that belongs to someone else, ask permission.
If you don't know how it works, don't touch it.
If you don’t know how to do this, ask right away.
If this does not concern you, do not interfere.
If you can’t understand something, scratch your head.
If you still don’t understand, don’t try.
If something explodes, check to see if there are any survivors.
If you have not learned these rules, do not enter the chemical laboratory.

III game. Black hat questions.

The facilitator invites team representatives to take turns drawing questions from the black hat:

This scientist is known throughout the world as the author of the discovery of the greatest law, but he is also the founder of the hydration theory of solutions. (D.I. Mendeleev).
In the atmosphere of this gas, rubber becomes brittle, and dyes ignite and become discolored; the name of this gas is translated from Greek as “smelling.” (Ozone).
One student states: “Sulfur sinks in water, because its density is 2.” And the second objected: “No, sulfur does not sink in water.” Which one is right? (Both, the pieces will sink and the powder will float).
Using this substance you can recognize sulfuric acid and its salts. (Barium chloride).
What stone played a major role in the history of chemistry, although it did not actually exist? (Philosopher's Stone).
They say that a “four-legged” co-author helped the French scientist Bernard Courtois discover this halogen. Name this element and the co-author of the discovery. (Yod, cat).

Experimental pause.

Leading. After getting acquainted with the rules of survival in a chemical laboratory, we invite our dear viewers to try to recognize the substances in the numbered test tubes: sugar, salt, flour, starch, soda, washing powder.

Be careful and follow the safety regulations.

(You can prepare assistants to demonstrate entertaining experiments).

IV game. “You for me, I for you.”

Team representatives prepare entertaining questions for each other.

Sample questions.

One day Berthollet was grinding KClO 3 crystals in a mortar, in which a small amount of sulfur remained on the walls. After some time, an explosion occurred. Thus, for the first time, Berthollet carried out a reaction that later began to be used in the production of... What? (The first Swedish matches).
The first aluminum home was recently built in Florida. Aluminum was obtained by processing recycled materials. In total, more than half a million units of this recycled material were required to build the house. What kind of raw material is this? (Beer and soft drink cans).
Parisian scientists Gay-Lussac and Humboldt were engaged in gas research. For experiments they needed thin test tubes, which were made only in Germany. But parcels were subject to high taxes. This was unaffordable for scientists. To avoid this, Humboldt proposed one solution, after which parcels began to pass through the border without duty. What was sealed in the test tubes if the parcels with the test tubes were labeled: “Caution! German…". (Air. At customs they couldn’t find the air tax on the card).
By order of Napoleon, a disinfectant with a triple effect was developed for soldiers on the march: healing, hygienic and refreshing. Nothing better was invented even 100 years later, so in 1913 at an exhibition in Paris this product received the “Grand Prix”. This remedy has survived to this day. Under what name is it produced in our country? (Triple cologne).

Musical pause.

Assistants or spectators perform ditties about chemistry.

Prepare appropriate costumes: tousled hair, torn robe, dirt on the face, bandaged finger, bandage on the eye, etc.

I received hydrogen
And added oxygen.
They exploded immediately
Now I walk without an eye.

I decided to taste the acid,
Lo and behold, the tongue is no longer in the mouth.
My tongue melted like ice
And it still burns in my mouth.

Don't think, friends,
Why did I come to school like that?
The evil alkali ate the dress,
This is it, brothers.

I missed the magic
I mixed the substances in a test tube
There was an explosion -
He was barely alive!

I stuck my finger into the test tube,
I got a hole in my finger.
That's the problem, the game is dangerous,
My tears are now in vain.

Oh guys, no doubt
We need to study chemistry.
Without knowledge of all phenomena
It's impossible to live today.

We need to do better
To us, friends, in teaching
And you shouldn't sigh
That chemistry is torture!

V game. “Race for the leader.”

The leader starts with the losing team.

Substances that accelerate chemical reactions. (Catalysts).
The most common element in nature. (Oxygen).
A chemical reaction that releases heat and light energy. (Combustion).
Reactions that occur with the release of energy. (Exothermic).
Complex substances formed by a metal and an acid residue. (Salt).
Name the substance Ca(NO 3) 2. (Calcium nitrate).
Homogeneous systems consisting of solvent and solute molecules. (Solutions).
Reaction between acid and base. (Neutralization).
Name the substance CuO. (Copper(II) oxide.
Oxides to which acids correspond. (Acidic).
Water-soluble bases (alkalis),
Slaked lime formula. (Ca(OH) 2).
Hydrochloric acid. (HCl).
Name the substance Na 2 HPO4. (Sodium hydrogen phosphate).
An oxide that reacts with acids and alkalis. (Amphoteric).
Author of the Periodic Law. (D.I. Mendeleev).
What does the element's serial number indicate? (Nuclear charge and number of electrons in an atom).
Varieties of an atom of the same element. (Isotopes).
How many electrons can be in the first orbital? (2 electrons).
The property of an element to attract electrons from other elements. (Electronegativity).
A bond formed by shared electron pairs. (Covalent).
A chemical bond that occurs between ions. (Ionic).
Particles at the nodes of the atomic crystal lattice. (Atomic).
Phosphoric acid formula. (H3PO4).
Name the substance Ba(OH)2. (Barium hydroxide).
The most electronegative element. (Fluorine).
The process of donating electrons. (Oxidation).
Author of the quote: “Chemistry spreads its hands wide into human affairs...” (M.V. Lomonosov).
Author of the Theory of Electrolytic Dissociation. (Svante Arrhenius).
Substances that change their color depending on the reaction of the environment. (Indicators).
The general name of elements VIII is D.I. Mendeleev’s group A. (Inert gases).
Destruction of metals under the influence of the external environment. (Corrosion),
General name for salts of nitric acid. (Nitrates).
“+” ions. (Cations).
Addition of electrons. (Recovery).
The most refractory metal. (Tungsten).
Sand with which you drink tea. (Sugar).
Element of “life and thought. (Phosphorus).
A metal that was used in the church to produce “Holy Water.” (Silver).
Deficiency of which element causes thyroid disease? (Yoda).
This element is part of toothpaste (Fluoride).
Metal is a symbol of the sun. (Gold).
This metal is in the thermometer. (Mercury).
This base is otherwise called: slaked lime, fluff, suspension - lime milk. (Calcium hydroxide).
Reagent for chloride ion. (Silver nitrate).
Carbon monoxide. (SO).
Type of reaction between zinc and hydrochloric acid. (Substitutions).
Who invented dynamite? (Nobel).
How is sodium stored? (Under kerosene).
Which element is always happy? (Radon).
What element was included in the structure that Tom Sawyer painted? (Bohr).
Which element does not have a permanent registration in the PSHE? (Hydrogen).
Which element forms the most compounds? (Carbon).
Type of sulfur oxidation reaction. (Connections).
What toxic substance is used for treatment at the Matsesta resort? (Hydrogen sulfide).

Chemical puzzles.

While the jury is summing up the final results, choosing the best player, the most active spectator, everyone present is offered chemical puzzles.

Results. Awards.

As prizes, you can offer bundles of dry goods to team captains, and symbolic chemical retorts to the best players.

Leading: Thank you everyone for your attention and participation in the game! Good luck in your further study of chemistry!

Extracurricular activity

"Chemical carousel"

Litvinenko Natalya Ivanovna

chemistry teacher,

Municipal budgetary educational institution

"Secondary school No. 3",

Aleksandrovsk, town. Yaiva

2015

Target: broadening the horizons of students, developing logical and analytical thinking abilities;

Tasks:

1) to form and improve the skills of independent and collective creative work.

2) develop the ability to work with additional literature;

3) instill interest in the science of chemistry.

Competitors.

The team consists of 5 people (8th grade students)

Homework :

Come up with a team name and motto.

Competition topics:

Initial chemical concepts, atoms of chemical elements, metals and non-metals - simple substances, compounds of chemical elements, types of chemical reactions, calculation of the mass of a substance, the amount of a substance using chemical formulas, calculation of the mass fraction of a dissolved substance in a solution, chemical properties of electrolytes.

Progress of the event:

Leading:Today we have gathered here to put the best students of our region to the test and answer the question: “Are they worthy of becoming the best chemists of the great chemical country?” This country is ancient and magical, keeping many mysteries. No one has yet been able to guess many of them! Only the smartest, bravest and most persistent this country reveals its secrets. A competent jury will accompany you and evaluate you:

Jury presentation;

So, let's begin! But first, meet Her Majesty Queen Amalgam III - the brilliant ruler of the chemical country. (Queen enters)

Queen. Good afternoon, my faithful subjects. Hello, dear jury. Today is a significant day for our state. We will be happy to join our ranks and award the title of “Chemistry Experts” to the most worthy of those present. Only for this you will need to pass a series of tests. Are you ready to show miracles of ingenuity, courage and brilliance of mind in order to earn in a fair fight the right to become a citizen of my magnificent country? Do you promise to fight honestly, without deception? I ask you, dear jury, to become unbiased judges and evaluate the teams fairly.

I ask all participants to take the oath of chemistry experts before starting the game.

We swear, without sparing our teeth, to gnaw on the granite of science. We swear!

We swear to always remember that the atomic-molecular doctrine was formulated by Mikhail Vasilyevich Lomonosov, and the periodic Law was formulated by Dmitry Ivanovich Mendeleev!

We swear to always follow safety rules when working in a chemical laboratory. We swear!

When pouring a bucket of water into a glass of acid, remember that the bucket of liquid does not fit into the glass. We swear!

During tests and exams, use only self-made cheat sheets. We swear!

Independently write reports and perform creative work using the Internet. We swear!

If we break this oath, then let my friends force us to drink a glass of tea with a spoonful of phenolphthalein. We swear! We swear! We swear!

Leading. So can we start?
Queen. Get started! But first I would like to get to know the teams.
Leading. Team presentation. This competition is not judged.

Each team is given a route sheet (Appendix No. 7), according to which the teams move between stations.

Subjects of stations:

Chemical labyrinth - time 5-7 minutes (Appendix No. 1)

Chemical puzzles and riddles - time 10 minutes (Appendix No. 2, 3)

Difficult problems and equations – time 10 – 12 minutes (Appendix No. 4)

Chemical cafe – time 10-12 minutes. (Appendix No. 5)

The work of each station is supervised by students in grades 10-11, who explain the procedure for completing tasks and evaluate the quality of performance. The assigned points are entered into the team’s route sheet. After passing all the stations, the route sheets are handed over to the jury, who transfer the points to the evaluation sheet, sum up the points received and distribute the places.

Leading: We are chemists, and chemistry means sleepless nights, constant conversations about chemistry, laboratory and practical work, and parents who say: “Ugh, our child is a chemist!” And this is happiness, and this is life!

Queen: You want to ask why people become chemists?

Leading: Yes, because chemistry means sleepless nights, constant conversations about chemistry, laboratory and practical work, and parents who say: “Our child is a chemist!” And this is happiness, and this is life!

Queen:

There is nothing else in nature
Neither here nor there, in the depths of space:
Everything – from small grains of sand to planets –
It consists of uniform elements.
Like a formula, like a work schedule,
The structure of the Mendeleev system is strict.
The living world is happening around you,
Enter it, inhale it, touch it with your hands.

Queen: I am proud to say that all representatives of today's game have overcome all obstacles in their path and reached the pinnacle of knowledge. Yes, I am convinced that you know chemistry well, and I can enroll you among the ranks of the inhabitants of my country. I will ask the jury to sum up the results of the team competition and tell us the winner.

Awards .

The winners of the competition are awarded diplomas, participants - certificates

Appendix No. 1 Station "Chemical Labyrinth"

Find the path that will take you to the finish line. Start walking through the maze from the top left cell. If the judgment entered in this cell is correct, then continue along the arrow marked “yes”. If this judgment is incorrect, then you should continue along the arrow marked “no”.Maximum score 10

"Labyrinth on the periodic table"
chemical elements D.I. Mendeleev"

Answer: 1, 2, 7, 8, 14, 18, 23, 19, 20

Appendix No. 2 Station “Chemical puzzles”

Answer:

1. Nickel. 2. Iodine. 3. Nitrogen. 4. Boron. 5. Manganese. 6. Silicon.

7. Arsenic. 8. Carbon. 9. Zirconium. 10. Argon. 11. Copper. 12. Krypton.

Appendix No. 3 Station “Auction of riddles about chemical elements”

1) I am the lightest and colorless gas,

Non-poisonous and harmless,

Connecting with oxygen

I give you water to drink.(Hydrogen)

2) If I shine a candle in the darkness -

Then I'm white

If there is powder at school -

Then I'm red.(Phosphorus)

3) He is everywhere and everywhere

In stone, air, water;

He is in the morning dew,

And in the blue sky.(Oxygen)

4) It is in white sand and quartz,

Composed of sand and alloys.

And if it gets into the rubber,

Gives it resistance to heat and frost.(Silicon)

5) I play a big role in life,

I am contained in the atmosphere.

I hardly dissolve in water.

I'm proud of my inertia.(Nitrogen)

6) Most often I am black in color

I can be transparent

They write and draw with me.

I can also be gloomy.(Carbon)

7) Find me among the marble,
I give hardness to the bones
You will still find me in the lime,
Now you will call me correctly. (Calcium)

8) Take a woman's name,
Change the letter “B” to “C”.
It was not in vain that I taught chemistry -
You have received the item. (Faith -Sulfur)

9) You can hear me
Sometimes in the summer sky.
Change “G” to “X” - so what?
The element is in front of you. (Thunder -Chromium)

Appendix No. 4 Station “Difficult problems and equations”

Chemical Equations "Substances Get Lost"

Assignment: Determine the chemical formulas of the missing substances, create equations for chemical reactions, and arrange the coefficients.

A) Ca + ? =CaABOUT

b)SO 3 + ? = K 2 SO 4 ;

V) ? +H 2 SO 4 = BaSO 4 + ?;

G) NaOH + ? = Na 3 P.O. 4 + ?;

d)AI(OH) 3 = ? + ?;

e) AgNO 3 + ? = AgCI + ?;

and) Zn + ?= ZnSO 4 + ?.

Tasks.

1. Determine the mass fraction of sugar in the condensed milk that the poodle Tatosha licked from the can while his owners were swimming in the river. It seemed to Tatosha that there was 180 g of sugar in the entire 400-gram mass of milk.

ANSWER: The share of sugar was0.45, or 45%.

2. Eating four ice creams in a row resulted in a fever and sore throat for Nastya. The doctor prescribed her to gargle more often with a 2% furatsilin solution. How many 250-gram glasses of this solution ended up in the sewer system if 8 packs of furatsilin, 10 tablets each, were consumed? Each pill weighs 0.5 g.

ANSWER: 2000 g will fall into the sewer,those. 8 glasses 2% solution of furatsilin.

3. After milking the cow, the housewife poured 2 liters of milk with a fat content of 4.6% into a pot. Having slept all day, the fat fluffy cat jumped onto the table and licked 200 g of settled cream with a fat content of 15%.Calculate how much fat is left in the pot? How many grams of fat did the cat eat? Take the density of milk as 1 g/cm 3

ANSWER: The cat ate 30 g of fat from 92 g. 62 g remained, which would be a fat content of 3.4%

Appendix No. 5 “Chemical Cafe”

Chemistry is the science of substances and their transformations. Imagine yourself as a bartender in a chemical cafe.

Assignment: using the proposed bottles with reagents, carry out chemical transformations and get:

1. "milk"

2. “raspberry syrup”

3. "sparkling water"

Write down the equations of chemical reactions in molecular form, indicate the sign of the chemical reaction.

Reagents : NaOH, H 2 SO 4 , BaCl 2 ,Na 2 CO 3 ,HCl, phenolphthalein .

Appendix No. 6 Evaluation sheet for the “Chemical Carousel” competition

Chemical

labyrinth

Puzzles and

puzzles

Difficult problems and equations

Chemical cafe

Total score

School No.…..

School No.......

Appendix No. 7 Route sheet

"Chemical carousel"

School No._A_

Station names

Points

Chemical maze

Riddles and puzzles

Difficult problems and equations

Chemical cafe

Route sheet

"Chemical carousel"

School No._B_

Station names

Points

Riddles and puzzles.

Chemical labyrinth.

Chemical cafe.

Difficult problems and equations.

Target: activation of cognitive activity, broadening the horizons of students
Tasks:
- development of logical thinking and interest in natural sciences, intellectual potential;
- development of communication skills;
- fostering collectivism.
The game is played for 9th grade students. The game is played by teams of 5 people (4 or more teams)
Preparing for the game: repeat the material studied in chemistry, the procedure for conducting qualitative reactions to ions.
Equipment: pieces of cloth soaked in NaCl; 4 (according to the number of commands) trays, in which there are 3 test tubes, NaOH, BaCl 2, AgNO 3; table for round 3; cryptograms, table for the tour; in seven numbered bottles: soda, sugar, salt, starch, washing powder, chalk, flour.
Leading: Dear assembled guests, we have invited you today so that you can witness how real detectives become. You will be offered a unique opportunity to attend the entrance exams to the School of Detectives. Today, 4(5) groups are taking entrance exams and you can provide all possible assistance to your teams so that they pass the tests successfully.
Let me introduce you to the competent jury that will evaluate your tests today………….
First tour
Teams present their name, logo and motto. (ESTIMATED at 3 points)
Second round
Leading: Translate the phrases you read from chemical language into common language. For each correct answer the team receives 1 point.
We listen carefully to the phrases, after that, if there is an answer, raise the sign with the team number and answer :

Not everything aurum what glitters. (gold)
White like calcium carbonate.(chalk)
Nedonodium chloride on the table, peresodium chloride on the head. (salt)
Ferrum character.(iron)
Word - argentum, silence - aurum.(silver, gold)
Leaves like Ash-two-o in silicon oxide. (water, sand)
Allotropic modification of carbon clean water. (diamond)
For cuprum the penny hanged itself. (copper)
Transparent as an alloy of lead and silicon oxides with sodium carbonate.(glass)
A lot of hydrogen oxide has since leaked. (water)
Kui ferrum, while it's hot. (Strike while the iron is hot).
Persistent stanumny soldier (The Steadfast Tin Soldier).

Leading: We ask experts to announce scores
Third round: Experimental. No room for error
Leading: Our teams successfully passed the first test, but a new one awaits them, requiring practical knowledge and skills.
“A piece of fabric was found at the scene of the robbery. Upon examining it, it became clear that it belonged to a criminal. Further investigation helped to discover the place of work of the alleged criminal - one of the chemical plants in the same city where the robbery took place.
The chemical plant consisted of six workshops. Each of them used one of the following substances: aluminum chloride, magnesium nitrate, iron (III) chloride, zinc sulfate, sodium chloride, potassium sulfate. Help the investigator narrow the search area for the criminal by identifying the workshop in which he works. Solve this problem in a rational way."
On your tables you have pieces of fabric, tables that you can use, and reagents with which you can determine the substance, and therefore the workshop.
This task will take 5-7 minutes to complete.
The competition is worth 5 points, taking into account speed and correctness of execution. To be assessed, you must pass the assignment algorithm.

Substance
Substance




	gelatinous ↓, dissolves in excess

Legend: * - avoid excess reagent; ν-substance is defined; ↓- the substance is insoluble in water.

Leading: While the teams are working hard on the task, the cheer team can earn extra points for their team. To do this, you need to solve puzzles in which the names of chemical elements are encrypted. Every rebus - 2 points(one fan representative pulls out two puzzles from the pile, which are drawn on separate sheets of paper)
Answers: Arsenic, boron, bismuth, nickel, zirconium, manganese, vanadium, copper, carbon, nitrogen, tin, astatine.

Leading: Experts, please announce the number of points for this competition and the total number.
Fourth round. Encryption
Leading: Criminals use various types of encryption to transmit messages to each other.
Decipher the first and last name of the director who filmed in 1984-1986. serial film "Mikhailo Lomonosov".
Participants, receive cryptograms:
1) 8,27,24,13,15,26 - a device used to purify water from insoluble impurities.
2) 6,3,27,4,22,7 - an item for receiving fire.
3) 6,1,26,17,14,17,19,17,26,17,19 - the name of the compound of a chemical element with hydrogen, which is rich in the springs of the Matsesta resort.
4) 1,10,15,17,19 - order of research of chemical phenomena
5) 18,22,7,24,7 - detail of analytical balances
6) 5,10,24,10,11,17 - metal, known since ancient times
7) 22,7,24,13,31,27,32 - a metal whose compound with chlorine is part of bleach
8) 25,7,28,24,20,19,10,25,27,10 - purposeful perception of chemical objects in order to study them

(Answers: 1) filter 2) match 3) hydrogen sulfide 4) method 5) scale 6) iron 7) calcium 8) observation
Director - Alexander Proshkin)
Leading: Experts evaluate the competition as follows: the first team to complete the task correctly receives 5 points, the second - 4, the third - 3, the fourth - 2. You must hand over the decryption of the cryptogram and the key. The task will take 5-10 minutes.
Leading: Task for fans - solve puzzles (on separate sheets)

Answers: Iron, nitrogen, germanium, gallium, copper, tin, sodium, polonium.

Answers: Chalk, evaporation, sugar, oxygen, combustion, hydrogen, water, rain.
Fifth round:
Leading: Any detective should be able to determine from one description what kind of substance we are talking about. Each team will be read some definitions related to the hidden substance. If the answer is ready after the first definition, then you get 5 points, if from the second, then -4, from the third -3, fourth -2, fifth only -1 point.
1)

This metal has been known to man since ancient times.
Its content in the waters of the world's oceans is approximately 8 billion tons.
The largest nugget of this metal weighed 112 kg.
Jewelry and coins are made from this metal.
This metal is a symbol of the sun (GOLD)

It is called lifeless gas
It is a fairly inert gas
Under normal conditions it reacts only with lithium
It's lighter than air
It is part of the air (NITROGEN)

This element is part of proteins.
Indispensable in the production of rubber and matches.
The simple substance of this element can be plastic, crystalline, monoclinic
The substance burns with a blue-bluish flame
Generally not wetted by water (SULFUR)

In the human body, this element is present in the tissues of the teeth, liver, and cells of the nervous system.
The substance containing this element is included in the powder
Its alloys are used in household items
This metal is not oxidized by atmospheric oxygen
An alloy of this metal with copper is called brass (ZINC)

350 BC Aristotle mentions this metal in his writings.
Alchemists often called this element Mercury.
This element dissolves other metals well, forming amalgams.
Metal fumes are terribly poisonous
Located inside the thermometer. (MERCURY)

He is called the all-consuming one.
Many researchers died during its discovery.
Contains freon.
Has high chemical activity.
Included in toothpaste (FLUORINE)

Scattered throughout the earth. There is a little in sea water.
Volatile, dark, crystalline
It is slightly soluble in water
Alcohol solution became typical
You will find it everywhere in pharmacies (Iodine)

This is a period 3 element, a non-metal.
In 1771, Karl Scheele developed a method for obtaining this substance from bones, which was used until the 19th century.
For the first time in 1669, this substance was obtained by the German pharmacist Brand.
Used in the production of matches
One of its modifications glows in the dark. (PHOSPHORUS)

This element is found in large quantities in sea water
The molecule of this element is diatomic.
Able to regulate the balance between the processes of excitation and inhibition in the cerebral cortex.
The name translated means “smelly”

5. The only liquid among non-metals. (BROMINE)

Countless are the compounds it forms
Due to the variety of compounds it forms, they were separated into a separate series.
In its pure form it is black, gloomy, infusible and barely flammable.
It happens like a transparent crystal in which a ray of sun shines
It is found in pencils, gemstones, and soot. (CARBON)

Leading: Experts, please announce the score for this competition and the overall score
Sixth round.Experimental.
On tables in numbered glasses or cups: starch, sugar, salt, soda, washing powder, flour, chalk.
Leading: Before you are seven white crystalline substances that are familiar to you. You must use your powers of observation to identify each of the substances. You can smell it, taste it by touch, but not taste it! Condition - for each guessed substance - 2 points, you get 14 points in total.
Answer: 1-washing powder, 2-soda, 3-salt, 4-flour, 5-starch, 6-chalk, 7-sugar.
Leading: In the meantime, our detectives are completing the task, we will look at various transformations (Experiments)
Leading: Participants, pass on your answers to the experts and listen to your explanations.
Experts, announce the score.
Seventh round
This is the last task in our detective school. Its implementation may still change everything. Be careful.
You did an excellent job with the experimental task, now you are asked to decipher the name of the substance. This task is assessed for speed. First team, the one who completed the task the fastest receives 4 points, second -3, third -2 and fourth -1 point.

Answer - The rebus is encrypted: Iron (III) oxide
Leading: Now we'll see which of the participants can become real criminologists
A word from the experts
(awarding teams, presenting diplomas to winners)
Thank you all for your attention and participation. Goodbye, see you again.

Application

DIPLOMA

Issued__________________________________________________________

student (tse) of 9 __ grade of school No. ___, ___________

is that he (s) ____ ___________ 20__

successfully completed

DETECTIVE SCHOOLS courses

This diploma gives the right to distribute

their knowledge in the field of CHEMISTRY,

both in class and outside of class time.

Chairman of the commission:

Experts:

City of Surgut

Table for tThird round: Experimental. No room for error

Substance
Substance
	gelatinous ↓, dissolves in excess



	gelatinous ↓, dissolves in excess

Substance
Substance






Certain substance

Table for the sixth round. Experimental.

Class
Substances	What number?





WASHING

Table for the fourth round: Encryption

Jury table

	Fans	Total score
1 point for each correct answer	2 points per puzzle

Municipal educational institution "Bendery gymnasium No. 2"

Extracurricular activity in chemistry

in 8th grade

« In the labyrinths of chemistry»

prepared

chemistry teacher

Stoyan A.V.

Educational objectives:

consolidation of theoretical knowledge acquired in chemistry lessons in the process of practical activities;

involvement of chemical words and expressions in the vocabulary;

development of communication skills;

implementation of interdisciplinary connections.

Corrective tasks:

development of memory, attention;

development of imaginative thinking;

development of creative imagination;

development of perception;

increased self-esteem, decreased anxiety.

Educational tasks:

nurturing love and respect for the subjects being studied;

development of students' creative abilities;

self-realization of a teenager’s personality through extracurricular activities.

Objectives of the event:

consolidate the knowledge acquired by students in chemistry lessons;

to interest students in the subject;

develop logical thinking, the ability to analyze, compare and generalize during the game;

help students demonstrate their potential abilities.

In the labyrinths of chemistry.

LEADING: Chemistry is a great science and is still completely unknown. Back in the 1st century. BC. in the poem “On the Nature of Things” by Titus Lucretius Cara there are discussions and explanations of chemical phenomena. Today our event is closely connected with chemistry, its processes and substances. For this we need two teams (teams take their places at the tables). PI present to you an independent jury that will judge our competition. (Jury Presentation).

LEADING: In order for our event to begin, we need to find out what our teams will be called. To do this, I will give each team a riddle. The answer to the riddle will be the name of the team. For the correct answer, each team will receive 1 point.

1. Guess the team name

For the first command:

I am, friends, everywhere:

In minerals and in water.

Without me you are like without hands:

There is no me - the fire has gone out. (Oxygen)

For the second command:

More often than not I am black in color,

I can be transparent.

They write and draw with me

I can also be gloomy. (Carbon)

For the third team:

I am the first in this world:

In the Universe, on the planet.

Turning into light helium

I light the sun in the sky. (Hydrogen)

2. Competition "Safety"

LEADING: I invite one participant from each team. They draw out a drawing on which the Safety Rule is drawn. They need to be told what rule is being discussed in the picture. For a correctly guessed rule, the team receives 5 points.

It is prohibited to eat or drink in the chemistry room.

You can sniff substances only by carefully directing their vapors or gases towards yourself with a slight movement of your palm.

When heating a test tube with liquid, hold it so that its open end is directed away from both yourself and its neighbors.

Let's check that the task is completed correctly. (A team member comes out and tells the safety rule)

Chemical pause

LEADING: Chemistry is the science of substances and their transformations; to the uninitiated they seem like miracles or magic tricks. And now we would like to show you a few tricks. (Neutralization reaction, decolorization of an acidified solution of manganese with hydrogen peroxide).

3. Competition "Decipherer"

LEADING:

In this competition, teams are asked to decipher phrases using the Periodic Table of Chemical Elements by D.I. Mendeleev. The letters of the text are encrypted with the numbers of chemical elements. To compose a phrase, you need to find the elements under these numbers and write down the first letter of the name of the chemical element.

For correctly completing the task, the team receives 5 points. 2-3 minutes are allotted to complete the task.

Task for the first team:

23-19.7, 5, 49, 11, 63, 22, 63 - 24, 49, 25, 49.49 -11, 63, 3, b, 79, I - 63, 16, 43, b - 49- 78, 49, 22, b.

(You are not allowed to eat or drink in the chemistry room)

Task for the second team:

3, 50, 25, 50, 11, 50, 16, 50, 23 –74, 63, 3, 49, 19, 49, 53 – 92, H, 63, 11, Y, 53 - 87, 49, 79, 49, 19 – 49 – 24, 49, 25, 39, 36.

(Lomonosov is a great scientist, physicist and chemist).

Task for the third team:

9,8,37,25,92,3,s – 16,50,47,81,18,83,3,i,63,29 – 84,76 - 83,18,57,63,41,73, 41,50,16,73,53.

Chemical pause

LEADING: In the meantime, I'll show you my magic. Look, the handkerchief burns and does not burn out. (Experience fireproof scarf)

LEADING: Let's check whether our teams solved the charades correctly.

After the competition, preliminary results are announced.

4. Riddles Competition

LEADING: In this competition, teams must solve 2 riddles. I will read them to each team in turn. For each correctly guessed riddle, the team will receive 1 point. If a team cannot guess the riddle, then the opposing team can guess it and be awarded that point.

1 team. I am silvery and light metal,

And I'm called airplane metal,

And I'm covered with an oxide film,

So that the oxygen doesn't get to me. (Aluminum).

Team 2 Having looked at my spectrum in the window,

They found me in the Sun.

I am friends with nobility,

I am part of the family of gases. (Helium)

Team 3 A person loves me!

I have named a whole century!

I'm shiny and red

Very good at alloys! (Copper)

1 team. .In the air it is the main gas,

Surrounds us everywhere.

Plant life fades away

Without it, without fertilizers.

Lives in our cells

An important element... (nitrogen)

Team 2 This is my nature:

Limestone, sand and soda,

They require a lot of fire,

To melt me down

I am transparent and light

And my name is (Glass)

Team 3 From the names of two animals

My name consists of

On the container where I am kept,

There is a toxic sign because it is a strong poison. (Arsenic)

LEADING: Let's summarize the preliminary results.

5. “Anagrams” competition

LEADING: Anagrams are riddles whose answers are made from the same letters. Having guessed one word in the riddle, you need to rearrange the letters so that you get a new one.

1. The letters are on the table in front of you.

The first word is one figure,

In total, mind you, there are four corners.

Be able to collect the second word -

You need to name the red-brown liquid. (rhombus - bromine)

2. The letters are on the table in front of you.

Arrange them so that they become words.

Two things with completely different purposes,

But they are both made of glass.

The first one is very significant in experiments.

The second is a vessel for intoxicating wine. (flask - glass)

3. The letters are on the table in front of you.

Arrange them so that they become words.

I am a flammable product, I “live” in the swamps.

But there is one letter in the name that is short.

Her leap was quick - and everything changed:

I have become an element. So a miracle happened! (peat - fluorine)

Playing with spectators

LEADING: and while the teams are completing the task, I will play with the audience. They will help you get points for your teams. For each correct answer, the player - spectator will receive 1 point.

1) Which element does not have a permanent “registration” in the periodic table of chemical elements? (Hydrogen)

2) The name of which metal carries the magician? (Magnesium)

3) Which gas claims that it is not it? (Neon)

4) Which non-metal is wood? (Bohr)

5) Which chemical element consists of two animals? (Arsenic)

6) What chemical element revolves around the sun? (Uranus)

7) Which element is a true giant? (Titanium)

9) Which chemical element can easily be turned into a fun show with clowns? (zinc - circus)

10) Which metal contains wood in its name? (Nickel)

11) What noble metal is made from marsh algae? (Platinum)

13) What chemical element do adults and children like to play with in their leisure time? (Gold)

14) The drink of sea pirates is composed of two chemical elements. What are these elements? (Bromine, chromium)

15) From what metal should one third be cut off to obtain the bone of an animal or human skeleton? (Silver)

LEADING: Bye the jury sums up the results, we take the chemist’s oath with you:

CHEMIST'S Oath

Accepting with deep gratitude the knowledge given to me
And comprehending the secrets of chemical science,
I swear on the names of Mikhail Vasilyevich Lomonosov,
Dmitry Ivanovich Mendeleev,
Alexander Mikhailovich Butlerov
And all our Teachers:
throughout your life not to tarnish the honor of the chemical fraternity,
which I am now entering. I swear! I swear! I swear!

LEADING: Let's find out the winner.

LEADING: All I have to do is wish everyone good luck and success. Study chemistry, and your thoughts will be more harmonious and your feelings more subtle.

In conclusion, we give the young chemists a festive fireworks display (burning of powdered iron in the flame of an alcohol lamp) as a gift.

Bibliography:

E.G. Zlotnikova, L.V. Makhova etc. “The lesson is over - classes continue.” Extracurricular work in chemistry. M. “Enlightenment” 1992

V.N. Aleksinsky “Entertaining experiments in chemistry” M. “Enlightenment” 1980

T.S. Nazarov, A.A. Grabetsky and others. “Organization of the work of a laboratory assistant in a school chemistry classroom” M. “Prosveshchenie” 1984.

Gabrielyan O.S., Smirnova T.V. We study chemistry in the 8th grade: a methodological guide to the textbook by O.S. Gabrielyan “Chemistry-8” - Moscow: “Blik and Co,” 2000 – p. 224.

Gabrielyan O.S., Yashukova A.V. Chemistry. Workbook 8th grade. To the textbook O.S. Gabrielyan "Chemistry - 8" M.: Bustard, 2006-2008.

Kurgansky S.M. Extracurricular activities in chemistry: Quizzes and chemistry evenings. - M.: 5 for knowledge, 2006. – 192 p. – (Methodological library).

Stepin B.D. Entertaining tasks and spectacular experiments in chemistry / B.D. Stepin, L.Yu. Alikberova. – M.: Bustard, 2002. – 432 p.: ill. – (Educational! Entertaining!).