Ionization potential is lowest for
Halogens
Inert gases
Alkaline earth metals
Alkali metals
Alkali metals, lower the no. of valence e−, lower is the value of ionization potential.
The first ionization energies of alkaline earth metals are higher than those of the alkali metals. This is because ...
The first ionization energies of alkaline earth metals are higher than those of the alkali metals. This is because:
Compare the alkali metals and alkaline earth metals with respect to (i) ionization enthalpy (ii) basicity of oxides and (iii) solubility of hydroxides.