The highest kinetic energy electrons in the photoelectron spectrum of H 2 O using 21.22 eV radiation

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The highest kinetic energy electrons in the photoelectron spectrum of H2O using 21.22 eV radiation are at about 9 eV and show a large vibrational spacing of 0.41 eV. The symmetric stretching mode of the neutral H2O molecule lies at 3652 cm−1.

(a) What conclusions can be drawn from the nature of the orbital from which the electron is ejected?

(b) In the same spectrum of H2O, the band near 7.0 eV shows a long vibrational series with spacing 0.125 eV. The bending mode of H2O lies at 1596 cm−1. What conclusions can you draw about the characteristics of the orbital occupied by the photoelectron?

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