Atomic Structure Question 351

Question: The number of unpaired electrons in nitrogen is [Pb. CET 2002]

Options:

A) 1

B) 3

C) 2

D) None of these

Show Answer

Answer:

Correct Answer: B

Solution:

According to Hund’s rule, the pairing of electrons will not occur in any orbital of a subshell unit and unless, all the available of it have one electron each. Electronic configuration of $ _7N^{14}=1,s^{2},,2s^{2},,2p_x^{1}2p_y^{1}2p_z^{1} $
Hence it has 3 unpaired electron in 2p-orbital.



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