* Atomic Radius Trend: Atomic radius increases as you move down a group (column) in the periodic table. This is because you are adding electron shells, making the atom larger.
* Location on the Periodic Table: Fluorine, chlorine, and bromine are all in Group 17 (halogens). Bromine is located below chlorine, and chlorine is below fluorine.
Therefore, bromine has the largest atomic radius because it has more electron shells than chlorine and fluorine.
