Silver sulfide (also written 'silver sulfide') has the formula Ag2S. It is the 'tarnish' or black coating that forms on silver plates, spoons, and even coins over time. How many silver atoms are in this formula?

This is a trick question, Ag is not the symbol for silver!

Select all the ones that are true for Ag2S

This formula has 3 atoms in total

this compound contains silver and sulphur

This compound forms when sulphur in the air or in food reacts with things made from silver

This formula has 3 atoms in total

this compound contains silver and sulphur

The name of this compound is silver sulphur

This compound forms when oxygen in the air reacts with silver on plates or coins

This compound forms when sulphur in the air or in food reacts with things made from silver

Trivia: Elements And Compounds Test! Ultimate Quiz

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Trivia: Elements And Compounds Test! Ultimate Quiz - Quiz

How well do you know your elements and compounds in chemistry? This quiz will reveal whether you do. What elements are attached by chemical bonds in rust, how many chlorine atoms you believe are in each particle of calcium chloride, the chemical formula for aluminum oxide, and how many silver atoms are in silver sulfide. This quiz can be helpful to you. Give it a go.

Questions and Answers

1.

Which one of these elements is found in the compound called calcium oxide (CaO)?
- A.
  
  Oxygen
- B.
  
  Carbon
- C.
  
  Oxide
- D.
  
  Calcide
Correct Answer
A. Oxygen

Explanation
Calcium oxide (CaO) is a compound composed of the elements calcium and oxygen. Oxygen is present in the compound as it combines with calcium to form calcium oxide. Therefore, the correct answer is oxygen.

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2.

This compound has the formula FeO. It is also known as 'rust'. What elements are bound together by chemical bonds in this compound?
- A.
  
  Lead and oxygen
- B.
  
  Iron and oxygen
- C.
  
  Fluorine and oxygen
- D.
  
  Fennel and oxygen
Correct Answer
B. Iron and oxygen

Explanation
Remember, some element symbols, like Fe are from the Latin name for a type of atom or substance.

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3.

What do you think the Science name for 'rust' is?
- A.
  
  Iron oxygen
- B.
  
  Iron oxate
- C.
  
  Tarnish
- D.
  
  Iron oxide
Correct Answer
D. Iron oxide

Explanation
Iron oxide is the correct answer because rust is a form of iron oxide. When iron reacts with oxygen and moisture in the presence of air, it undergoes oxidation and forms iron oxide, commonly known as rust. This reddish-brown compound is formed on the surface of iron or steel objects and is responsible for their corrosion. Therefore, iron oxide is the scientific name for rust.

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4.

How many atoms are in one particle of FeO?
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  4
Correct Answer
B. 2

Explanation
The correct answer is 2 because FeO is a compound consisting of one iron (Fe) atom and one oxygen (O) atom. Therefore, there are two atoms in one particle of FeO.

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5.

CaCl₂ is another compound. Although it is a type of chemical called a 'salt' it is not edible like table salt. It would burn a person's mouth if they ate it! How many chlorine atoms do you think are in each particle of calcium chloride?
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  None
Correct Answer
B. 2

Explanation
The little 2 (or other numbers) in chemical formulae tell us how many of each type of atom (elements) would be in one particle. The number goes AFTER the element it is for. If there is only one of an element, we don't bother to show the little 1. So calcium chloride's formula shows ONE Ca and TWO Cl (this would be THREE atoms in total)

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6.

Aluminum oxide is a compound with the formula Al₂O₃. How many ATOMS IN TOTAl (both Al and O) are in this formula?
- A.
  
  2
- B.
  
  3
- C.
  
  3
- D.
  
  5
Correct Answer
D. 5

Explanation
There are TWO aluminium atoms (the 2 is after the Al) and THREE oxygen atoms (the 3 is after the O). This makes 2 + 3 = 5 atoms in total.

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7.

How many ATOMS IN TOTAL are in the formula for aluminum chloride? AlCl₃
- A.
  
  2
- B.
  
  3
- C.
  
  4
- D.
  
  5
Correct Answer
C. 4

Explanation
There is only ONE Al atom because there is NO LITTLE NUMBER after the Al. Remember, we don't write a little number if there is only one of the elements.

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8.

Silver sulfide (also written 'silver sulfide') has the formula Ag₂S. It is the 'tarnish' or black coating that forms on silver plates, spoons, and even coins over time. How many silver atoms are in this formula?
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  This is a trick question, Ag is not the symbol for silver!
Correct Answer
B. 2

Explanation
The formula Ag2S indicates that there are two silver atoms present in each molecule of silver sulfide.

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9.

Select all the ones that are true for Ag₂S
- A.
  
  This formula has 3 atoms in total
- B.
  
  This compound contains silver and sulphur
- C.
  
  The name of this compound is silver sulphur
- D.
  
  This compound forms when oxygen in the air reacts with silver on plates or coins
- E.
  
  This compound forms when sulphur in the air or in food reacts with things made from silver
Correct Answer(s)
A. This formula has 3 atoms in total
B. This compound contains silver and sulphur
E. This compound forms when sulphur in the air or in food reacts with things made from silver

Explanation
There are tiny amounts ('traces' or sulphur in our food and in the air we breathe. Especially the air near hot pools like those found in Rotorua! The rotton egg smell is our nose detecting sulphur atoms or sulphur dioxide gas! The silver and sulphur react to form silver sulphide.

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Trivia: Elements And Compounds Test! Ultimate Quiz

Which one of these elements is found in the compound called calcium oxide (CaO)?

This compound has the formula FeO. It is also known as 'rust'. What elements are bound together by chemical bonds in this compound?

What do you think the Science name for 'rust' is?

How many atoms are in one particle of FeO?

CaCl2 is another compound. Although it is a type of chemical called a 'salt' it is not edible like table salt. It would burn a person's mouth if they ate it! How many chlorine atoms do you think are in each particle of calcium chloride?

Aluminum oxide is a compound with the formula Al2O3. How many ATOMS IN TOTAl (both Al and O) are in this formula?

How many ATOMS IN TOTAL are in the formula for aluminum chloride? AlCl3

Silver sulfide (also written 'silver sulfide') has the formula Ag2S. It is the 'tarnish' or black coating that forms on silver plates, spoons, and even coins over time. How many silver atoms are in this formula?

Select all the ones that are true for Ag2S

CaCl₂ is another compound. Although it is a type of chemical called a 'salt' it is not edible like table salt. It would burn a person's mouth if they ate it! How many chlorine atoms do you think are in each particle of calcium chloride?

Aluminum oxide is a compound with the formula Al₂O₃. How many ATOMS IN TOTAl (both Al and O) are in this formula?

How many ATOMS IN TOTAL are in the formula for aluminum chloride? AlCl₃

Silver sulfide (also written 'silver sulfide') has the formula Ag₂S. It is the 'tarnish' or black coating that forms on silver plates, spoons, and even coins over time. How many silver atoms are in this formula?

Select all the ones that are true for Ag₂S