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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 absorbing light, the ion undergoes a transition to the 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.
The state `S_1` is

A

1s

B

2s

C

2p

D

3s

Text Solution

Verified by Experts

The correct Answer is:
D
`(S_1)` is the initial spherically symmetrical state with one radial node=2s. `(S_2) 2p` has no radial node, it must be 3p with one radial node.
`( E ) = -13*6 ((3)^2)/((3)^2)=-13*6 ev =(E_1)_H`
`S_1` is a 2a orbital.
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