For which of the following species, the expression for the energy of electron in `n^(th)` orbit `[E_(n) = -(13.6)/(n^(2)) xx Z^(2) e "V atom"^(-1)]` has the validity ?

Options

A. Tritium
B. `Li^(2+)`
C. Deuterium
D. `He^(2+)`

Answer

A, B, C

Explanation

The given expression is valid for single electron species i.e., for tritrium, `Li^(2+)` and deuterium.