Give the general characteristics of the compounds of the alkali metals.

Explanation

(i) The compounds of alkali metals are ionic in nature.
(ii) The oxides and perioxides of alkali metals are colourless in pure form. The superoxides of alkali metals are coloured.
(iii) The alkali metal halides have high melting point. They follow the trend as given below:
Fluoride>Chloride>Bromide>Iodide.
(iv) Oxo-acids of alkali metals are generally soluble in water. they are thermally stable.