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

Explanation

Ionization enthalpy: Because of high nuclear charge the ionization enthalpy earth metals are higher than those of the corresponding alkali metals.
(ii) Basicity of oxides: Basicity of oxides of alkali metals are higher than that of alkal metals.
(iii) Solubility of hydroxides: Solubility of hydroxides of alkali metals are higher than alkaline earth metals. Alkali metals due to lower ionization enthalpy are more electron than the corresponding group 2 elements