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

  • question_answer \[Fe\] (atomic number = 26) atom has the electronic arrangement           [NCERT 1974; MNR 1980]

    A)                 2, 8,  8, 8              

    B)                 2, 8, 16

    C)                 2, 8,14, 2             

    D)                 2, 8, 12, 4

    Correct Answer: C

    Solution :

                    \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}},4{{s}^{2}}3{{d}^{6}}=2,\,8,\,14,\,2\].

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