InterviewSolution
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InterviewSolution
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Which one of the following ions has electronic configuration `[Ar]3d^(6)` ? `(At. Nos. Mn = 25, Fe = 26, Co = 27, Ni = 28)`A. `Ni^(3+)`B. `Mn^(3+)`C. `Fe^(3+)`D. `Co^(3+)` |
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Answer» Correct Answer - D `Ni^(3+)(28)=[Ar]3d^(7)` `Mn^(3+)(25)=[Ar]3d^(4)` `Fe^(3+)(26) = [Ar]3d^(5)` `Co^(3+)(27)=[Ar]3d^(6)` Hence, `Co^(3+)` has `3d^(6)` electronic configuration correct answer is (d). |
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