1.

A hydrogen atom and a `Li^(2+)` ion are both in the second excited state. If `l_H` and `l_(Li)` are their respective electronic angular momenta, and `E_H and E_(Li)` their respective energies, then(a) `l_H gt l_(Li) and |E_H| gt |E_(Li)|`(b) `l_H = l_(Li) and |E_H| lt |E_(Li)|` (C ) `l_H = l_(Li) and |E_H| gt |E_(Li)|`(d) `l_H lt l_(Li) and |E_H| lt|E_(Li)|`A. `l_(H) gt l_(Li)` and `|E_(H)|gt|E_(Li)|`B. `l_(H) = l_(Li)` and `|E_(H)|lt|E_(Li)|`C. `l_(H) = l_(Li)` and `|E_(H)|gt|E_(Li)|`D. `l_(H) lt l_(Li)` and `|E_(H)|lt|E_(Li)|`

Answer» Correct Answer - B
In second excited state `n = 3`
So `l_(H) = l_(Li) = 3((h)/(2pi))`
While `E prop Z^(2)` and `Z_(H) = 1, Z_(Li) = 3`
So `|E_(Li)| = 9|E_(H)|`or `|E_(H)|lt|E_(Li)|`


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