Which Element Has The Smallest Atomic Radius Out Of Sodium, Hydrogen, ANd Lithium?
All the elements mentioned above are members of Group I of the Periodic Table. It is characteristic of the table that atomic radii increase down the groups and decrease across the periods. The above mentioned elements are in the order: Hydrogen Lithium Sodium Therefore, hydrogen, being the first of the group, has the smallest atomic radius, while sodium has the largest atomic radius out of the three.
