Chemical equations - AQA Synergy

1

What is the chemical symbol for the element mercury?

2

What is the chemical formula for chlorine?

3

What is the name of the compound with the formula MgBr2?

4

How many different types of atom are in one molecule of a substance that has the formula N2O4?

5

What is the formula of water?

6

What is the best definition of a compound?

7

What is the formula of a substance made up of Al3+ ions and O2- ions?

8

What are the reactants in this word equation?

sodium hydroxide + hydrochloric acid → sodium chloride + water

9

Which numbers correctly fill the gaps to balance this equation?

__Na + Cl2 → __NaCl

10

Which numbers correctly fill the gaps to balance this equation?

C3H8 + __O2 → __CO2 + __H2O