Question

Why electron gain enthalpy of fluorine is less than chlorine?

Answer 1

✔✅The negative electron gain enthalpy of fluorine is less than that of chlorine. It is due to small size of fluorine atom. As a result, there are strong interelectronic repulsions in the relatively small 2p orbitals of fluorine and thus, the incoming electron does not experience much attraction

Answer 2

Explanation:

becoz fluorine is a very small atom so bcoz of which electron repulsion is much more in it then in chlorine. So coming electron faces more screening effect in fluorine than in chlorine.