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4n series

  1. Sep 17, 2011 #1
    Why is the Thorium decay series called 4n? I've looked it up but the explanation isn't clear
     
  2. jcsd
  3. Sep 17, 2011 #2

    mathman

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    Thorium-232 and all its daughter nuclides have atomic mass numbers (number of protons plus number of neutrons) which are multiples of 4, i.e. 4n, where n is an integer.
     
    Last edited: Sep 17, 2011
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