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what is the reason why electron gain enthalpy of fluorine is less than chlorine

what is the reason why electron gain enthalpy of fluorine is less than chlorine
 

Grade:12

1 Answers

Aman Kashyap
110 Points
6 years ago
Chlorine (Cl) has more negative electron gain enthalpy than fluorine (F). F has less negative electron gain enthalpy because in it the added electron goes to the smaller energy level (n=2) and hence suffers significant repulsion from the electrons already present in this shell.

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