Which of the following is the energy of a possible excited state of hydrogen-

Options

A. `-3.4eV`
B. `+6.8eV`
C. `+13.6eV`
D. `-6.8eV`

Answer

A

Explanation

Energy of an electron in the n-th orbit of H-atom is,
`E_(n)=(-13.6)/(n^(2))eV=(-13.6)/(2^(2))=3.4eV`