Alkaline earth metals always form divalent cations even through their second ionization enthalpies are almost double than their first ionization enthalpies . Explain .

Alkaline earth metals always form divalent cations even through their

1.	Alkaline earth metals always form divalent cations even through their second ionization enthalpies are almost double than their first ionization enthalpies . Explain .
Answer» Solution :In the solid state , higher enthalpy of lattice formationby `M^(2+)` ions (as compared to `M^(+)`ions) more than compensates the higher SECOND ionization enthalpies of METALS and in AQUEOUS solution , higher enthalpy of HYDRATION of `M^(2+)` ions (as compared to `M^(+)` ions) more than compensates the higher second ionization enthalpy