The correct order of ionization energy of C, N, O, F is — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

Ionization energy is the amount of energy required to remove an electron from an isolated neutral gaseous atom. Ionization energy increases from left to right in periods and it decreases down the group. But the ionization enthalpy of nitrogen is more than oxygen due to the stability of half-filled p-orbitals. The correct order is C < O < N < F .