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2. structure of atom — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry2. structure of atom1 Mark
MCQ
The electronic configuration (outermost) of $M{n^{ + 2}}$ ion (atomic number of $Mn = 25$) in its ground state is
  • ✓
    $3{d^5},4{s^0}$
  • B
    $3{d^4},4{s^1}$
  • C
    $3{d^3},4{s^2}$
  • D
    $3{d^2},4{s^2}4{p^2}$
✓

Answer

Correct option: A.
$3{d^5},4{s^0}$
a
$_{25}Mn = [Ar]\,3{d^5}4{s^2} - 2 e^-$ $\rightleftharpoons $ $M{n^{2 + }} = [Ar]\,\,3{d^5}\,4{s^0}$

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