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The energy of an electron in an excited ...

The energy of an electron in an excited state of hydrogen atom is `-3.4 eV`. The angular momentum of the electron in this state is

A

`0.211 xx 10^-34 Js`.

B

`2.11 xx 10^-34 Js`.

C

`211 xx 10^-34 Js`.

D

`21.1 xx 10^-34 Js`.

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