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Unformatted text preview: closer together, we expect a higher electron-electron interaction energy in parahelium, and indeed we see that the parahelium states are somewhat higher than the corresponding orthohelium states (i.e. (Para) 200 > (Ortho) 200 and (Para) 21m > (Ortho) 21m etc.) Periodic Table: We now know the ground state configuration of the first two elements in the periodic table. Z Element Ground State Configuration 1 1 H 1 (1s) 1 2 S 1/2 2 4 He 2 (1s) 2 1 S Spectrum of Helium (actual spectrum) 54.4 eV -59.4 eV -79 eV -58.2 eV The labeling suppresses the (1s)!...
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- Spring '07