Question

The energy of separation of an electron is $30.6eV$ moving in an orbit of $L{i}^{2+}.$ Find out the number of waves made by the electron in one complete revolution in the orbit.

Answer 1

As the energy of separation of an electron is 30.6eV means it has this much energy in the ground state.
By calculation, as $E=\frac{-13.6Z^2}{n^2}$​;
Here $Zis3,n=2$
So, the number of waves made by the electron in one complete revolution in the orbit is $2$.