JEE Main & Advanced Chemistry Structure of Atom Question Bank Quantum number, Electronic configuration and Shape of orbitals

  • question_answer The number of unpaired electrons in \[F{{e}^{3+}}(Z=26)\] are [KCET 2000]

    A)                 5             

    B)                 6

    C)                 3             

    D)                 4

    Correct Answer: A

    Solution :

               \[F{{e}^{3+}}\]\[(z=26)\]            \[F{{e}^{3+}}=[Ar]\,3{{d}^{5}}4{{s}^{0}}\]                                                                Total no. of unpaired electron=5

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