Which of the following statements strictly correctly compare the electron affinities (EA) or the mag — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

Due to the exceptionally small size of 2nd period elements causing high inter-electronic repulsion, 3rd period p-block elements consistently show higher EA magnitudes than their 2nd period counterparts. Thus $Cl > F$, $S > O$, and $Si > C$. Statement D is incorrect because N has an endothermic (positive) electron gain enthalpy, while P is exothermic, making the EA of P greater than N.