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The kinetic energy of the electron prese...

The kinetic energy of the electron present in the gound state of `Li^(2+)` ion is represented by:

A

`+(3e^2)/(4pi epsilon_0 r)`

B

`-(3e)/(4 pi e_0 r)`

C

`-(3e^2)/(4pi epsilon_0 r^2)`

D

`-(3e^2)/(4pi epsilon_0 r)`

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