Question

Electron gain enthalpy of Cl is higher than F. Why?​

Answer 1

Electron gain enthalpy of Cl is higher than F because Cl has an higher atomic radius than compared to F. So the EGE of Cl is higher...

Answer 2

Answer:

Due to its small size, the electron–electron repulsions in the relatively compact 2p-sub-shell are comparatively large, and hence, the incoming electron is not accepted with the same ease as is the case with larger Cl atom. Consequently, electron gain enthalpy of Cl is more negative than that of F.