1. Starter Potassium and oxygen Sodium and chlorine Magnesium and oxygen
Name the compounds containing these elements:
Potassium and oxygen
Sodium and chlorine
Magnesium and oxygen
Copper and fluorine
Potassium, oxygen and hydrogen
Potassium oxide
Sodium chloride
Magnesium oxide
Copper fluoride
Potassium oxide
Potassium hydroxide
Sodium chloride
Magnesium oxide
No reaction
Potassium hydroxide

2. Magnesium and oxygen
No atoms are created or destroyed in a chemical reaction.
There should be the same number of atoms of each type of element each side of the equation.
Magnesium + Oxygen Magnesium oxide
Allow students to burn magnesium ribbon in air, then demonstrate Mg in a gas jar of oxygen.

3. Other reactions Sodium + Hydrogen 1. Sodium + Water  hydroxide
2. Carbon + oxygen 
3. Hydrochloric + Sodium  acid carbonate
4. Calcium 
carbonate
Sodium Hydrogen
hydroxide
Carbon dioxide
Sodium + Carbon + Water
chloride dioxide
These reactions could be completed as a circus with students writing the completed word equation and the noting their observations.
Iron + oxygen  iron oxide
Sodium hydroxide + hydrochloric acid  water + sodium chloride
Calcium + water  calcium hydroxide + hydrogen
Zinc + hydrochloric acid  zinc chloride + hydrogen
Potassium hydroxide + sulfuric acid  potassium sulfate + hydrogen
As an extension pupils could be asked to classify the reactions.
Carbon + Calcium
dioxide oxide

4. Use space filler diagrams to represent atoms in a reaction

5. What happens during a chemical reaction?
Hydrogen + Iodine  Hydrogen iodide +
Bonds are broken between reactant
Bonds are formed to create products

6. Element Key Hydrogen (H) Carbon (C) Sulphur (S)
Oxygen (O) Nitrogen (N) Chlorine (Cl)
Nitrogen (N2) Hydrochloric acid (HCl)

7. Element Key Hydrogen (H) Carbon (C) Sulphur (S)
Oxygen (O) Nitrogen (N) Chlorine (Cl)
Water (H2O) Hydrogen (H2) Ammonia (NH3)

8. Element Key Hydrogen (H) Carbon (C) Sulphur (S)
Oxygen (O) Nitrogen (N) Chlorine (Cl)
Methane (CH4) Carbon tetrachloride Sulphur dioxide
(CCl4) (SO2)

9. Space filler equations!
An example
H Cl  HCl 

10. Space filler equations!
C O  CO2
2 H O  H2O
CH O  CO H2O +   +  + +