Why is electron gain enthalpy of chlorine is more than fluorine?

The size of fluorine atom is small. As a result, there are strong electron-electron repulsions in the compact 2p-orbital. Thus, the electron gain enthalpy of fluorine is less negative than that of chlorine.
Hope it is clear to you.
Best Wishes!

  • 78

 electron gain entjhalpy of electrons can be increased down the group so f has less negative than chlorine

  • -31
What are you looking for?