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The angular momentum of an electron in a...

The angular momentum of an electron in a certain orbit of `Li^(+2)` ion is `3.15xx10^(-34)` (in SI units). What will be the potential energy of electron in that orbit?

A

`-13.6eV`

B

`-27.2eV`

C

`+13.6eV`

D

`-53.4eV`

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