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

  • question_answer Which of the following has more unpaired \[d\]-electrons [CBSE PMT 1999]

    A)                 \[Z{{n}^{+}}\]   

    B)                 \[F{{e}^{2+}}\]

    C)                 \[{{N}^{3+}}\]   

    D)                 \[C{{u}^{+}}\]

    Correct Answer: B

    Solution :

               \[F{{e}^{2+}}\,[Ar]\,3{{d}^{6}}4{{s}^{0}}\] \[F{{e}^{2+}}\]consist of maximum 4 unpaired electrons.

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