Question

How does atomic radius vary from period of periodic table?

Answer 1

when we move up to down in periodic table atomic radius increase

and when we move left right it decrease

i think it is helpfull for you

Answer 2

When we go from left to right in a period the atomic size /atomic radius decreases  . This happens due to the fact the as we go from left to right numbers of protons increases hence results in increasing the attraction between the electrons in outermost shell and nucleus . Which results I. Decreased atomic radius