The explanation for the presence of three unp | vedclass

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(B) Hund's rule states that pairing of electrons in the orbitals of a subshell (orbitals of equal energy) starts only when each orbital is singly fill

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Hund's rule

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(B) Hund's rule states that pairing of electrons in the orbitals of a subshell (orbitals of equal energy) starts only when each orbital is singly filled. Since nitrogen has an atomic number of $7$,its electronic configuration is $1s^2 2s^2 2p^3$. According to Hund's rule,the three electrons in the $2p$ subshell occupy separate orbitals,resulting in three unpaired electrons.

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

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