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Question

The presence of one electron each in the three 2p orbitals of nitrogen is explained by

A
Pauli's principle
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B
Bohr's theory
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C
Hund's rule
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D
Uncertainty principle
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Solution

The correct option is C Hund's rule
The presence of one electron each in the three 2p orbitals of nitrogen is explained by Hund's rule of maximum multiplicity. According to Hund's rule, the pairing of electrons in the orbitals belonging to the same subshell does not take place until each orbital belonging to that subshell is singly occupied. Thus, the correct answer is (b).

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