Question

Define atomic size?​

Answer 1

Answer:

Explanation:Atomic size is the distance between a nucleus of an atom and it's valence or outermost shell.

Answer 2

Answer:

Explanation:

Atomic size is the distance between the center of the nucleus of the atom to the outermost shell of that atom. 

The periodic trend for atomic size is it increases across a period from right to left and increases topp to bottom in a group.