a) Calculate the excitation energies for the 1s→ 3p electron transition for the H-atom and for the He+-ion. Calculate the energy values in joules. b) What is the ionization energy (in eV) of H-atom in the 4d-state? Note: En = Z² En 1Eh=27.2114eV = 2625.500kJ/mol = 4.35974394-10-18 J 2n² 3
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