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Iron ions

  1. Oct 25, 2007 #1
    [SOLVED] Iron ions

    I am curious about the properties of iron ions fe2+ and fe3+. As they are accelerated in a mass spectrometer, which would travel faster and have the largest radius. I understand that they have lost electrons and have a marginal loss in mass, as well I understand that a positively charged ion will attempt to return to a neutral state. However how do I prove it with the following:

    m= qBr/2V, understanding that both B and r are squared.

    Any help would be great, thanks.
  2. jcsd
  3. Oct 25, 2007 #2


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    Mass spectrometer strictly speaking measure mass/charge ratios - so an Fe2+ ion would behave the same as a Al+ ion with half the mass.
    You generally try not to multiply ionize atoms to avoid this!

    (My wife is the MS expert but she's at work)
  4. Oct 26, 2007 #3
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