Question

give reason fluorine has less electron affinity than chlorine​

Answer 1

Answer:

Atomic size of flourine is very small.Its small 2p can not accommodate extra electrons because repulsion force will act among them leading to instability.

Answer 2

Answer:

Fluorine has less electron affinity as the atom has 2 valence shell which makes it closely bounded with the nucleus and thus have less potential to gain an electron to complete its octet.

Whereas Chlorine has 3 valence shell which increases the atomic radius of the atom and hence it can easily gain an electron to complete its octet.

Hope it helps..!!