Question

How can u explain the variation of atomic radius in a period and group??

Answer 1

Across period : atomic radius decreases along period as nucleic charges increases.  Along Group : atomic radius increases along the group. ..... Hope this helps u  Pls mark as brainliest answer. .......

Answer 2

atomic radius dec along the period (inversely proportional to z effective) and increases down the group(directly proportional to no. of shells)