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

Options

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

Answer

C

Explanation

`E_(n)(Li^(2+))=E_(1)(H)`
`rArr -13.6(3^(2))/(n^(2))= -13.6xx(1)/(1)`
`rArrn=3`