The electron affinity (negative electron gain enthalpy) of Group 17 elements shows a notable anomaly — p Block Elements Chemistry Question

💡 Solution & Explanation

Chlorine has a higher electron affinity than Fluorine. The 2p orbitals of Fluorine are very compact, so adding an incoming electron causes strong inter-electronic repulsions, making it less favorable than adding it to the larger 3p orbitals of Chlorine.