Question

nitrogen (Z=7) and phosphorus (Z=15) belong to same group 15 of the periodic table . which of these two is more electronegative? why?

Answer 1

n=2,5
phosphorus=2,8,5

Nitrogen is more electronegative than phosphorus. On moving down a group, the number of shell increases. Therefore, the valence electrons move away from the nucleus and the effective nuclear charge decreases. This causes the decrease in the tendency to attract electron and hence electronegativity decreases.

Answer 2

nitrogen is more electronegative than phosphorus because electronegativity is decrease down the group as metallic charcter increasea