Chemistry - PERIODIC TABLE Question with Solution | TestHub

Among the ions ${\mathrm{Na}}^{+}(\mathrm{g}),{\mathrm{Mg}}^{+2}(\mathrm{g})$ and ${\mathrm{Al}}^{3+}(\mathrm{g})$ which ion has both largest size in gas phase and highest hydration enthalpy in aqueous medium :