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Questions  >>  SAT  >>  Chemistry  >>  Atomic Structure
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Q)

Which one of the following ions has electronic configuration $[Ar]3d^6?$

$\begin{array}{1 1} (a)\;Ni^{3+} \\(b)\;Mn^{3+} \\ (c)\;Fe^{3+} \\ (d)\;Co^{3+} \end{array} $

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