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

💡 Solution & Explanation

Second ionization energy is the energy required to remove the second electron after the removal of first electron from its outermost orbital. The order of stability of electronic configuration is- Fully filled>Half-filled The electronic configuration of the following elements is shown below- 2 2 1 2 2 2 2 2 3 2 2 4 (5) 1 2 2 (6) 1 2 2 (7) 1 2 2 (8) 1 2 2 C s s p N s s p O s s p F s s p InO , half-filled p-orbital is present, so, its second ionization potential is greater than F . Thus, the correct option is (c) O F N C .