Chemistry - Complete s-block Question with Solution | TestHub

The charge/radius ratio of$\mathrm{M}{\mathrm{g}}^{2+}$is larger than that of$\mathrm{N}{\mathrm{a}}^{+}$, but smaller than those of$\mathrm{B}{\mathrm{e}}^{2+}$,$\mathrm{M}{\mathrm{g}}^{3+}$and$\mathrm{A}{\mathrm{l}}^{3+}$. Therefore, the hydration energy of$\mathrm{M}{\mathrm{g}}^{2+}$is higher than that of$\mathrm{N}{\mathrm{a}}^{+}$.