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

  • question_answer
    The radius of electron in the first excited state of hydrogen atom is                                         [MP PMT 2004]

    A)                 \[{{a}_{0}}\]      

    B)                 \[4{{a}_{0}}\]

    C)                 \[2{{a}_{0}}\]    

    D)                 \[8{{a}_{0}}\]

    Correct Answer: B

    Solution :

               \[r\propto {{n}^{2}}\] (excited state \[n=2\])                                 \[r=4{{a}_{0}}\]


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