The explanation for the presence of three unpaired electrons in the nitrogen atom can be given by -

Options

A. Heisenberg ' s uncertainty principle
B. Aufbau ' s rule
C. Pauli ' exclusion law
D. Hund ' s rule

Answer

D

Explanation

`N(Z=7): 1s^(2)2s^(2)2p^(1)._(x)2p^(1)._(y)2p^(1)._(z)`
The presenc eof three unpaired electrons in nitrogen is explained by Hund's rule.