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  4. The electronic configuration of an element with atomic number 7 i.e. nitrogen atom is

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Q. The electronic configuration of an element with atomic number $7$ i.e. nitrogen atom is

Structure of Atom

Solution:

$_7{N}=1s^{2},2s^{2}2p^{1}_{x} 2p^{1}_{y},2p^{1}_{z}$ . Hund’s rule states that pairing of electrons in the orbitals of a subshell (orbitals of equal energy) starts when each of them is singly filled.