Question

Nitrogen forms only ncl3 but phosphorus forms pcl3 and pcl5 both.explain.

Answer 1

Although Nitrogen is more electronegative than P  and, both of them have the outer shell configuration of ns2 np5, Nitrogen does not have empty orbitals required for the formation of 5 bonds with Cl to form NCL5 atom, but empty d orbital is present in P.

Thus both PCl5 and PCl3 can exist but NCl5 cannot be formed.

Answer 2

Answer:

Explanation:

Nitrogen froms only NCl3 but Phosphorus froms PCl3 and PCl5 both although both belongs to same group,Why? Full explaination with figure.