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

  • question_answer An electron has principal quantum number 3. The number of its (i) sub-shells and (ii) orbitals would be respectively [MP PET 1997]

    A)                 3 and 5 

    B)                 3 and 7

    C)                 3 and 9 

    D)                 2 and 5

    Correct Answer: C

    Solution :

                    The principle quantum number \[n=3\]. Then azimuthal quantum number \[l=3\] and number of orbitals \[={{n}^{2}}={{3}^{2}}=9\]. 3 and 9

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