Question

Arrange the elements Nitrogen, Phosphorus, Oxygen and Sulphur in decreasing order of atomic radii.

Answer 1

$\bm{Phosphorus > Sulphur > Nitrogen > Oxygen}$

Here,

Nitrogen and Phosphorus is of same group i.e $\textit {group 15.}$

Oxygen and Sulphur is of same group i.e $\textit {group 16.}$

Also,

Nitrogen and Oxygen is of same period i.e $\textit {period 2.}$

Phosphorus and Sulphur is of same period i.e $\textit {period 3.}$

Answer 2

Phosphorus>sulphur>nitrogen.