Question

trends of atomic size

Answer 1

The atomic radius increase moving down a group. once again protons are added moving down a group,but so are new energy shells of electrons.the new energy shells provide shielding, allowing the valence electrons to experience only a minimum amount of protons .

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.