Question

Atomic radius goes on increasing down a group give reason

Answer 1

This is caused by the increase in the number of protons and electrons across a period. One proton has a greater effect than one electron; thus, electrons are pulled towards the nucleus, resulting in a smallerradius.Atomic radius increases from top to bottom within a group. This is caused by electron shielding.

Answer 2

this is coz down the group the ability of the nucleus to hold the electrons in different shells decreases coz a new she'll is being added every time and hence the distance decreases. as distance and force are inversely proportional so it happens in that way.