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in the problem, you can assume a "hydrogen-like" nucleus. You have a selenium atom, with an...

in the problem, you can assume a "hydrogen-like" nucleus. You have a selenium atom, with an electron in the 5th excited state. The electron undergoes spontaneous emission and Is in the third excited state.

a.) what is the energy of the photon emitted?

b.) what is the frequency of the photon?

c.) what is the difference in the radius of the orbits?

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