Atomic radii

1:atomic radii is the measure of the size of its atoms,usually the mean or typical distance from the nucleus to the boundary of the surrounding electrons.

2:atomic radii increases from top to bottom.

3:the elements are arranged by number of protons as you get lower the elements have more protons.the electrons orbit the protons in layers.only so many electrons fit in each layer,so the extras are bumped to a higher and higher layer.

Atomic radii