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Homework Help: Photoelectron spectroscopy experiment

  1. Oct 23, 2012 #1
    1. In a photoelectron spectroscopy experiment Ar is ionised, i.e. an electron
    is removed from one of the single electron orbitals into the vacuum. An
    Ar+ ion remains behind. Write down all possible electron configurations
    and corresponding terms of the resulting Ar+ ion (assuming that the photon
    energy is high enough to allow ionisation of any single electron orbital).

    So my question is what is a single electron orbital? Seeing that it's Ar which is a noble gas it can't be an orbit with a single electron. Help clearing out the definition would be much appreciated :)
  2. jcsd
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