Which group of elements has the largest atomic radii

I wanted to verify if it's Group 7.

While it might be logical to think that each element adds an electron and therefor it get larger, so that elements on the right side of the table would be the largest, that is not what happens.

Each element also adds a proton to the nucleus, so the force pulling the electrons in gets stronger too, so atoms actually get smaller going from left to right across a period.

Two factors make the group 1 elements the largest of a period:
1: a new energy level is started, it has a larger radius.
2: there are more core electrons "hiding" or shielding the valence electrons from the nucleus.

Group IA has the largest atomic radii.

group 1