Question

Lithium Sodium Potassium in which group of the periodic table should they belong which of them have largest atomic radius and why

Answer 1

1st group
k has largest atomic radious
size increases down a group as no of shells increase

Answer 2

As all of them have only on electron in their valence shell they belong to Group 1

K has the largest atomic radius among the three because it has maximum number of shells.Higher the number of shells, larger is the atomic radius.

i hope it helps you