# The energy of separation of an electron is 30.6 eV moving in an orbit of Li2+. The number of waves made by the electron in one complete revolution in the orbit is:

#### 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=−13.6Z2n2;

Here Z is 3, n=2

So, the number of waves made by the electron in one complete revolution in the orbit is 2.