ChemistryThe radius (in nm) of first orbit of He+ is :

The radius (in nm) of first orbit of He+ is :

  1. A

    0.0529

  2. B

    0.2645

  3. C

    0.01322

  4. D

    0.529

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    Solution:

    Expression of Bohr's radius is:

    Bohr radius=Rn2Z

    Here, Ro is 0.529 A.

    For He+, n=1, and Z=2.

    Bohr radius=0.529 A2=0.2645 A

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