Question

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:

Solution
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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.

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