Atomic number of nitrogen is 7 . The atomic number of the third member in the same family is

Given Data: It is asked in the question Atomic number of the third member

Concept Used: Atomic number

Detailed Solution:

The periodic table's group 15 includes nitrogen.

The nitrogen family and pnicogens are further names for group 15 elements.

For the elements in this group to complete their octet and reach a stable state, they can either lose 5 electrons or gain 3 electrons.

There are three common oxidation states: -3 and +3.

This constituent elements of group  are Nitrogen (7), Phosphorus (15), Arsenic (33), Antimony (51), and Bismuth (83)

Arsenic(As) with atomic number 33 is the third member of the nitrogen family.

Hence, the required answer is 33.