The energy of an electron is the 3S orbital (excited state) of H - atom is

Options

A. `-1.5 eV`
B. `-13 eV`
C. `-3 eV`
D. `-4.53 eV`

Answer

A

Explanation

Energy (E ) of n=1 i.e is
`=(13.6xx1)/(1)=-13.6 eV`
(ii) for n=3 i.e 3s
`E=-(13.6)/(9) eV`
=-15 eV