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The hydrogen like species Li^(2+) is in ...

The hydrogen like species `Li^(2+)` is in a spherically symmetric state `S_(1)` with one radial node. Upon absorbinf light the ion undergoes transition to a state `S_(2)` The state `S_(2)` has one radial node and its energy is equal to the ground state energy of the hydrogen atom.
Energy of the state `S_(1)` units of the hydrogen atom ground state energy is

A

0.75

B

`1.50`

C

2.25

D

`4.50`

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The correct Answer is:
C
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