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E=1/n^2 (-13.6eV) for other one-electron atoms –ionized helium (Z=2),

  1. Sep 21, 2008 #1
    E=1/n^2 (-13.6eV) for other one-electron atoms –ionized helium (Z=2), doubly-ionized lithium (Z=3),etc. I found contradicting here is that one-electron atom and Z=2, 3. If it’s one electron, then there is only one proton, so where do 2 or 3 protons come from?
    Thanks.
     
  2. jcsd
  3. Sep 21, 2008 #2

    cepheid

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    Re: energy

    Umm...doubly ionized Lithium is missing two of it's electrons. Hence it has one electron and three protons. That's why it is IONized.
     
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