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Structure of Atom — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryStructure of Atom1 Mark
Question
How many unpaired electrons are present in N(7)? Name the principle which explains the presence of these unpaired electrons.
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Answer

$\text{N}(7):1\text{s}^2\ 2\text{s}^2\ 2\text{p}^1_\text{x}\ 2\text{p}^1_\text{y}\ 2\text{p}^1_\text{z},$ there are 3 unpaired electrons due to Hund's rule.

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