What are the first three energy levels of a copper (Cu, z = 29)) atom if we cons

Question

What are the first three energy levels of a copper (Cu, z = 29)) atom if we consider it hydrogen-like (only one electron but all of the Cu protons)? What photon energy is needed to cause an electron to jump from the 1st copper atom energy state to free space detached from the atom (n = infinity)? Can a photon excite an electron to jump from the 1s state to the 2s state (yes or no)? Write an approximate equation for the energy levels of the outermost electron of a neutral copper atom. Do protons and neutrons in the nucleus of the Cu atoms have the same mass as free protons and neutrons? If different which would have the greater mass? IF a 50KV electron strikes a Cu target does it have enough energy to "knock" an electron in the lowest energy state out (free)? If a free energy electron (from part f above) falls back into the lowest energy state (n = 1) releasing the energy as a X-ray photon, what would be the energy of the X-ray photon (you probably already calculated the answer in one of the earlier parts of this question).

Explanation / Answer

1) En = -13.6*(Z2/n2) eV ; where Z = atomic number and n = orbit number

Thus, E1 = -13.6*(292/12) = -11437.6 eV

E2 = -13.6*(292/22) = -2859.4 eV

E3 = -13.6*(292/32) = -1270.84 eV

2) energy required to ejaculate the electron = 11437.6 eV = 1.83*10-15 J

Thus, energy of photon = 1.83*10-15 J

3) Yes, a photon can excite an electron to jump from 1s to 2s subshell.

4) Protons and neutrons donot have the same mass as they are free.Proton has lesser mass.

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