What would you observe when zinc is added to a solution of iron (II) sulphate? Write the chemical reaction that takes place.

(i) Write the electron-dot structures for sodium, oxygen, and magnesium.

(ii) Show the formation of Na₂O and MgO by the transfer of electrons.

(iii) What are the ions present in these compounds?

Define the following terms :

(i) Mineral

(ii) Ores and

(iii) Gangue

Name two metals which are found in nature in the free state.