Question

Among p,s,cl,f which has most electron gain enthalpy and which has least

Answer 1

Answer:

Halogens have highest negative value of electron gain enthalpy. Here Cl and F both are halogens but electron gain enthalpy of Cl is more negative than F because of very small size of F which causes interelectronic repulsion among its electrons. P has the lest negative one due to larger size.

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