why-does-the-atomic-radius-decrease-as-you-move-up-a-group-on-the-periodic-table

Question

Why does the atomic radius decrease as you move up a group on the periodic table?

Accepted Answer

There are fewer electron shells, resulting in less shielding.

Answer

The number of protons decreases, reducing nuclear charge.

Answer

The number of neutrons increases, increasing nuclear attraction.

Answer

The outer electrons are further from the nucleus.