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

  • question_answer Following Hund?s rule which element contains six unpaired electron                                       [RPET 2000]

    A)                 Fe          

    B)                 Co

    C)                 Ni           

    D)                 Cr

    Correct Answer: D

    Solution :

               Electronic configuration of the \[C{{r}_{24}}\] is \[[Ar]\,4{{s}^{1}}3{{d}^{5}}\] or

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