Question

Which of the following elements has the largest atomic radius?

Silicon
Aluminum
Sulfur
Phosphorous

Answer 1

francium

Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, 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.

Answer 2

aluminum has the largest atomic radius