Question

What is the ionization energy of Magnesium?

Answer 1

1. Ionization energy is defined as the amount of energy required to remove an electron from the outermost shell of an isolated gaseous atom.
2. The electronic configuration of Magnesium is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^2$.
3. The outermost shell of the element is $3\mathrm{s}$ and this shell is fully filled. So, removing an electron from this shell is difficult.
4. As a result, the ionization enthalpy of Magnesium is quite high.
5. The first ionization energy of Magnesium is $737kJmo{l}^{-1}.$