Answer to Question #255097 in General Chemistry for niko

Question

The naming of groups on the periodic table of elements undergoes changes, explain

mention the group before and after the change and explain why the change

that can happen

Answer 1

In general, atomic radius decreases across a period and increases down a group. Down a group, the number of energy levels (n) increases, so there is a greater distance between the nucleus and the outermost orbital. This results in a larger atomic radius.