Discuss the similarities between alkaline earth metals and gradation in the following aspects: (ii) Hydration enthapies.

Explanation

Hydration enthalpies: Alkali metal ions `(M^(2+))` have more charge and small size. So they have high hydration enthalpies. But with the increase in ionic size the attraction towards water molecules decreases. So hydration enthapies of alkaline earth metal ions decreases gradually down the group.