Question

7. 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?​

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 electronegativity decreases.

Answer 2

Answer:

Nitrogen (N), At. No. =7

Electronic Configuration =2,5.

Phosphorus (P), At. No =15

Electronic Configuration =2, 8, 5.

Thus, nitrogen will be more electronegative because its atom has small size due to which the attraction of its nucleus for the incoming electrons is more.

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