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JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank Atomic models and Planck's quantum theory

  • question_answer
    In Bohr?s model, atomic radius of the first orbit is \[\gamma \], the radius of the 3rd orbit, is         [MP PET 1997; Pb. CET 2001]

    A)                 \[\gamma /3\]

    B)                 \[\gamma \]

    C)                 \[3\gamma \]   

    D)                 \[9\gamma \]

    Correct Answer: D

    Solution :

               \[r\propto {{n}^{2}}\]                    For Ist orbit \[\gamma =1\]                    For IIIrd orbit = \[\gamma \propto {{3}^{2}}=9\]                                 So it will 9\[\gamma \]. 


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