The highest first ionization potential is of — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

Ionization energy is the amount of energy required to remove an electron from a neutral gaseous atom. It increases from left to right in a period due to the decrease in atomic radius. But, the ionization potential of nitrogen is more than the ionization potential of oxygen because of the half-filled stability of p-orbitals in nitrogen. Therefore, the order of the first ionization potential is N > O > C > B . Hence, nitrogen has the highest first ionization potential.