The hydrogen -like species ` Li^(2+)` is in a spherically symmetric state ` S_1` whth one radisal node . Upon absorbing light the ion undergoes transitoj ot a state ` S_2` has one radial node and its enrgy is equal to the groun sate energy of hhe hydrogen atom.
Energy fo the `(S_1)` in units fo the hydrogen atom groun sate enrgy is :

Options

A. `0. 75`
B. ` 1. 50`
C. ` 2. 25`
D. ` 4. 50`

Answer

C

Explanation

` (E_(s_(1)))/(E_(H (ground)) )= ( -13.6 xx 9)/(4xx(-13 .6))0 = 2.25`.