Question

why nitrogen is more electronegative than phosphorus

Answer 1

https://m.meritnation.com/ask-answer/question/b-why-is-nitrogen-more-electronegative-than-phosphorus/periodic-classification-of-elements/7043382
(b) Why is nitrogen more electronegative than phosphorus ...
https://m.meritnation.com/ask-answer/question/b-why-is-nitrogen-more-electronegative-than-phosphorus/periodic-classification-of-elements/7043382
(b) Why is nitrogen more electronegative than phosphorus ...
https://m.meritnation.com/ask-answer/question/b-why-is-nitrogen-more-electronegative-than-phosphorus/periodic-classification-of-elements/7043382
(b) Why is nitrogen more electronegative than phosphorus ...
https://m.meritnation.com/ask-answer/question/b-why-is-nitrogen-more-electronegative-than-phosphorus/periodic-classification-of-elements/7043382
(b) Why is nitrogen more electronegative than phosphorus ...

Answer 2

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.