Question

The ion that has the highest hydration enthalpy is:

• A. $B{a}^{2+}$
• B. $N{a}^{+}$
• C. $B{e}^{2+}$
• D. $K^{+}$

Answer 1

The correct option is C $B{e}^{2+}$

Hydration energy increases with an increase in the charge density. So $B{e}^{2+}$ has the highest hydration enthalpy.