Question

Why does cesium $\left(Cs\right)$ have a larger atomic radius than lithium $\left(Li\right)$?

• A. Atomic radius increases as you move from right to left and top to bottom
• B. Atomic radius increases as you go from left to right and bottom to top on a periodic table
• C. Both $Cs$ and $Li$ have the same atomic radius
• D. It cannot be determined which element has the higher atomic radius

Answer 1

The correct option is A Atomic radius increases as you move from right to left and top to bottom

$Cs$ has larger atomic radius than $Li$, because of atomic radius increases when you go from top to bottom, because there is increase one shell around the nucleus in each step down the group.

Hence the correct option is A.