Question
The first ionization enthalpy of Na, Mg and Si, respectively, are : 496, 737 and $786 \mathrm{~kJ} \mathrm{~mol}^{-1}$. The first ionization enthalpy ($\mathrm{kJ} \,\mathrm{mol}^{-1}$) of $\mathrm{Al}$ is :
The first ionization enthalpy of Na, Mg and Si, respectively, are : 496, 737 and $786 \mathrm{~kJ} \mathrm{~mol}^{-1}$. The first ionization enthalpy ($\mathrm{kJ} \,\mathrm{mol}^{-1}$) of $\mathrm{Al}$ is :