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JEE Main & Advanced Physics Atomic Physics Question Bank Atomic Structure

  • question_answer
    According to Bohr's model, the radius of the second orbit of helium atom is                                         [Bihar MEE 1995]

    A)            0.53 Å                                      

    B)            1.06 Å

    C)            2.12 Å                                      

    D)            0.265 Å

    Correct Answer: B

    Solution :

               \[r=\frac{{{n}^{2}}}{Z}({{r}_{0}})\]; Þ \[{{r}_{(n=2)}}=\frac{{{(2)}^{2}}}{2}\times 0.53=1.06\,{\AA}\]


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