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The total energy of the electron in the ...

The total energy of the electron in the first excited state of hydrogen is `-3.4 eV`. What is the kinetic energy of the electron in this state?

A

`-3.4` eV

B

`-6.8` eV

C

`6.8` eV

D

`3.4` eV

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The correct Answer is:
D
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