ATS KS3 Chemistry: Chemical Compounds

How many atoms of oxygen are there in water? H₂O

• 1
• 2
• 0

How many atoms of sulphur are in sulphuric acid? H₂SO₄

• 6
• 2
• 4
• 1

How many atoms are there all together in HCl?

• 1
• 2
• 3

What are the different elements in carbon dioxide?

• carbon
• cobalt and oxygen
• oxygen and carbon
• oxide and carbon

How many atoms are there all together in Magnesium hydroxide? Mg(OH)₂

• 3
• 5
• 2

How many different elements make up nitric acid? HNO₃

• 1
• 5
• 3

How many atoms in total are there in nitric acid? HNO₃

• 3
• 6
• 5

What elements make up Copper sulphate? CuSO₄

• copper, sulphate
• copper, sulphur
• copper, sulphur and oxygen
• copper and oxygen

What is the correct chemical formula for water?

• H2O
• HO2
• H₂O
• H²O

How many atoms of hydrogen are in ethanol? C₂H₅OH 

• 5
• 2
• 6
• 9