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In hydrogen atom, energy of first excit...

In hydrogen atom, energy of first excited state is `- 3.4 eV`. Then, `KE` of the same orbit of hydrogen atom is.

A

`+ 3.4 ev`

B

`+ 6.8 eV`

C

`– 13.6 eV`

D

`+ 13.6 eV`

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A
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