Question: Q. 9. In the first excited state of hydrogen atom, its radius is found to be 21.2×1011 m. Calculate its Bohr radius in the ground state. Also calculate the total energy of the atom in the second excited state.

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Solution:

Ans.

r0=21.2×1011 m

First excited state means, n=2

(1)r0=n2r1

or

r1=r0n2

r1=21.2×10114 m

=5.3×1011 m E=13.6n2 E=13.622=3.4eV

Long Answer Type Questions



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