Question:
The correct order of the atomic radii of $\mathrm{C}, \mathrm{Cs}, \mathrm{Al}$, and $\mathrm{S}$ is :
Correct Option:
Solution:
On going down the group, size increases while going from left to right in a period size decreases, so order is $\mathrm{C}<\mathrm{S}<\mathrm{Al}<\mathrm{Cs}$.