Question

as you travel up a group, what happens to atomic size? it increases it stays constant it depends on the group it decreases

Explanation:

Atomic size is determined by the distance from the nucleus to the out - most electron shell. As you move up a group in the periodic table, the number of electron shells decreases. Fewer electron shells mean the outermost electrons are closer to the nucleus, resulting in a smaller atomic size.

Answer:

it decreases