Question

out of the following which has more negative electron gain enthalpy. justify your answere. f or cl

Answer 1

fluorine
because it is compact in nature
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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.