Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the Periodic Table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?
Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the Periodic Table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?

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.