Question

How the atomic radius of element changes along a group and along a period?
Explain in short and easy way.

Answer 1

the atomic radius decreases along the period and increases along group.

since the no of shells increases along period and hence the distance between the nucleus and valance electron becomes greater along period and vice versa occurs along group i.e increases down the group

hope this helped you!!

Answer 2

Atomic radius:

increases along the group.

decrease across the period

hope it helps you out