Question

What is electron rrpulsion and how it affects the electron affinity

Answer 1

Answer:

Electron affinity of fluorine is less than that of chlorine.

There occurs repulsion among electrons of the valence shell and also with electron to be added. This repulsion is responsible for less tendency of F-atom to accept electron. around the nucleus. This crowding is able to screen the nucleus.

Answer 2

Answer: The electron affinity is a measure of the attraction between the incoming electron and the nucleus - the stronger the attraction, the more energy is released.

Explanation:

As one goes down the period, the shielding effect increases, thus repulsion occurs between the electrons.