Which enrgy state of doubly ionized lithium `(Li^(++)` has the same energy as that of the gorund state of hydrogen?

Options

A. n=1
B. n=2
C. n =3
D. n=4

Answer

C

Explanation

`E prop (Z^2)/(n^2)`
`:. (Z)^2/(n^2) =1`
or n = Z =3.