The energy level scheme for the hypothetical one-electron element Searsium is sh

Question

The energy level scheme for the hypothetical one-electron element Searsium is shown in the figure. The potential energy is taken to be zero at an infinite distance from the nucleus.

The energy level scheme for the hypothetical one-electron element Searsium is shown in the figure. The potential energy is taken to be zero at an infinite distance from the nucleus. How much energy (in electron volts) does it take to ionize and electron from the ground level? An 18-eV is absorbed by a Searsium atom in its ground level. As the atom returns to its ground level, what possible energies can the emitted photon have? Assume there can be transitions between all pairs of energy levels. What will happen if a photon of energy 8eV strikes a Searsium atom in its ground level? Why? Photons emitted in the Searsium transitions n=3->n=2 and n=3->n=1 will eject photoelectrons from an unknown metal, but the photon emitted from the transition n=4->n=3 will not. What are the limits (maximum and minimum possible values) of the work function of the metal?

Explanation / Answer

1) 20

2) 3,5,10,8,15,18

3)nothing because minimum energy requred for exitation is (20-10) =10ev

4)3< x < 5

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