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JEE Main & Advanced Physics Atomic Physics Question Bank Atomic Structure

  • question_answer
    When hydrogen atom is in its first excited level, its radius is .... its ground state radius                     [CBSE PMT 1997]

    A)            Half                                          

    B)            Same

    C)            Twice                                      

    D)            Four times

    Correct Answer: B

    Solution :

               \[r\propto {{n}^{2}}\]. For ground state n=1 and for first excited state n=2.


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