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Nitrogen atom has 3 unpaired electrons in its ground state. It can be explained by

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Auf - bau principle

Paulis principle

Hund's rule

None of these

answer is C.

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Detailed Solution

According to Hund’s rule, same energy of the orbital’s are filled with single electron after that electrons are pairing up in the orbitals.

As per Hund’s rule nitrogen have three unpaired electrons in 2p orbital.

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