The size of the gray circle represents atomic radius, or the size of an atom. Which area of the periodic table
has elements with the largest atomic radius?

Here u go

Explanation:

Atomic radii varies in a predictable way across the periodic table. The atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.

Metals and nonmetals

Explaination: Metals and nonmetals tend to form ionic bonds.