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What is a compound? Find out in this educational quiz.
Compounds
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In Science terms, a chemical compound is a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances by chemical reactions. There are literally billions of compounds!
1.
A compound is a substance which contains .......
only one type of atom
only two types of atom
two or more chemicals which can be easily separated
two or more elements chemically joined together
2.
The number of different elements in calcium carbonate (CaCO3) is .......
2
3
4
5
Ca, C and O
3.
Which of the following could have been formed by reacting iron with sulfur?
Iron oxide
Sulfuric iron
Iron sulfide
Sulphuric acid
There are two elements joining together so the name ends in -ide
4.
The formula of methane is CH4. Which of these is true?
A molecule of methane contains five atoms
A molecule of methane contains five different elements
An atom of methane contains two different elements
Methane contains five molecules
Methane exists as molecules and has two different elements
5.
Which of these is NOT a compound?
Carbon monoxide
Chlorine
Hydrochloric acid
Propane
Chlorine is an element
6.
How many atoms in the formula CuSO4?
3
4
6
7
One Cu, one S, four O
7.
The correct formula for carbon tetrachloride is .......
C3Cl
C4Cl
CCl3
CCl4
8.
The smallest particle of carbon dioxide (CO2) that still has the properties of carbon dioxide is called .......
a molecule
a proton
an atom
an ion
9.
Which of these word equations is INCORRECT?
Copper + oxygen → copper oxide
Hydrogen + chlorine → hydrogen chlorine
Iron + chlorine → iron chloride
Magnesium + oxygen → magnesium oxide
10.
Which is the correct formula equation?
Mg + O → MgO
Mg + O2 → MgO2 →
2 Mg + O2 → Mg2O2
2 Mg + O2 → 2 MgO
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