Question

c) Electron affinity decreases on moving down the group but increases on moving across the period. give reason

plis answer ​

Answer 1

Answer:

Explanation:

This type of question can be easily explained with the help of effective nuclear charge.

Down the group due to increase in atomic size effective nuclear charge decreases.so Electron affinity decreases

Along a period from left to right

effective nuclear charge decreases due to decrease in atomic size.

So, electron affinity increases.