Compare alkali metals and alkaline earth metals with respect to

Compare the alkali metals and alkaline earth metals with respect to
(i) ionization enthalpy (ii) basicity of oxides
(iii) solubility of hydroxides.

(i) Ionization enthalpies The first ionization enthalpies of the alkaline earth metals are higher than those of the corresponding alkali metals. This is due to their small size as compared to the corresponding alkali metals.
But second ionization enthalpies of the alkaline earth metals are smaller than those of the corresponding alkali metals.
(ii) Basicity of oxides The oxides of the alkali and alkaline earth metals dissolves in water to form basic hydroxides. The alkaline earth metal hydroxides are however less basic and less stable than alkali metal hydroxides.
(iii) Solubility of hydroxides The solubility of hydroxides of alkaline earth metals is relatively less than their corresponding alkali metal hydroxides.