Question

(ii) Which of these will be more electro negative and why?​

Answer 1

Answer:

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 electro negativity decreases.

Step-by-step explanation:

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Answer 2

Answer:

The electronic configuration of nitrogen N(7)=2,5

Phosphorous P(15)=2,8,5

N is more electronegative than P.

From top to bottom down a group, electronegativity decreases. This is because number of shell increases down a group, and thus there is an increased distance between the valence electrons and nucleus, or a greater atomic radius.