Question

Nitrogen (atomic number-7) and Phosphorus (atomic

number-15) belong to group -15 of the modern periodic table.

(i) Write the electronic configuration of these two elements.

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


​

Answer 1

Answer:

(i) Ans. Nitrogen: K=2 ,L=5.

Phosphorus: K=2 ,L=8 ,M=5.

Answer 2

Answer:

i)electronic configuration of :

nitrogen: 1s^2,2s^2,2p^3

phosphorus:1s^2,2s^2,2p^6,3s^2,3p^3

ii) nitrogen is more electronegative because the atom of nitrogen is smaller in size.