Question

Potassium lithium sodium beryllium which of these atoms have smallest atomic radius

Answer 1

beryllium have smallest atomic radius

Answer 2

Answer:

Lithium as atomic radius increases down a group or from top to bottom. This is because while going down a group a new shell is added. Therefore, the distance between the outermost Electron and the nucleus goes on increasing. Hence,element Lithium has the smallest atomic radius as it has only 2 shells.