Nitrogen:

Atomic number – 7

Electronic configuration – 1s² 2s² 2p³

Nitrogen:

Atomic number – 15

Electronic configuration – 1s² 2s² 2p⁶ 3s² 3p³

The number of shell increases in the periodic table when we go down the group. When you remove a group from the table of days, the number of shells increases. As a result, the valence electrons move away from the electrons and the effective charge of nuclei decreases. This causes a decrease in the tendency to attract electrons so the electro negativity decreases. For all these reasons the element nitrogen is more electronegative than the element phosphorus.