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If the binding energy of the electron in...

If the binding energy of the electron in a hydrogen atom is `13.6 eV`, the energy required to remove the electron from the first excited state of `Li^(++)` is

A

`122.4eV`

B

`30.6 eV`

C

`13.6eV`

D

`3.4 eV`

Text Solution

Verified by Experts

The correct Answer is:
B
For first excited state `n=2` and for ` LI^(+ +) z=3`
` E_n = ( 13.6 )/(n^2 ) xx z^2 = ( 13.6 )/(4) xx 9 = 30. 6 eV `
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DISHA PUBLICATION-ATOMS-EXERCISE-2: CONCEPT APPLICATOR
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