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Structure of Atom — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryStructure of Atom1 Mark
Question
Write electronic configuration of $\mathrm{Ni}^{2+}($ Atomic number of $\mathrm{Ni}=28)$.
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Answer

$1 s^2 ~2 s^2 ~2 p^6 ~3 s^2 ~3 p^6 ~4 s^0 ~3 d^8 .[\because$ Electrons are removed from 4s orbital first, then from 3d]

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