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Percent at. concentration unit?

  1. Dec 12, 2008 #1
    % at. concentration unit???

    hi all
    i wonder if someone can help me to know about the concentration measurement unit (% at. ), what does that mean??

  2. jcsd
  3. Dec 12, 2008 #2


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    Re: % at. concentration unit???

    It's the percentage of a solute measured by counting atoms.
  4. Dec 12, 2008 #3


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    Re: % at. concentration unit???

    As opposed to, for example, % by mass.
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