Give the formulae of the stable binary compounds that would be formed by the combination of the following pairs of elements.

(a) Mg and N2

(b) Li and O2

(c) Al and Cl2

(d) K and O2

Answers:

(a) Magnesium Nitride (Mg₃N₂)

(b) Lithium Oxide( Li₂O)

(c) Aluminium Chloride( AlCl₃)

(d) Potassium Oxide ( K₂O)