Write down the formulae of
(i) sodium oxide
(ii) aluminium chloride
(iii) sodium sulphide
(iv) magnesium hydroxide
Write down the formulae of the following compounds:
(i) Potassium oxide
(ii) Aluminium Nitride
(iii) Hydrogen sulfide
(iv) Calcium hydroxide
Write the chemical formula of the following compounds
(a) Calcium oxide (b) Calcium Hydroxide (c) Aluminium Sulphate