What is the energy of the electron revolving in third orbit expressed in eV?

Options

A. 4.53 eV
B. 1.51 eV
C. 4 eV
D. 3.4 eV

Answer

B

Explanation

Energy of the electron in `n^(th)` orbit is
`E_(n)=-(13.6)/(n^(2))` eV
For third orbit, `n=3`
`:.F_(3)= - (13.6)/(3^(2)) eV= - 1.51 eV`