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Why hydrogen is not used to compare the relative atomic mass

  1. Dec 17, 2014 #1
    Is that because of some historical reasons or E=mc2(i mean something about binding energy)?
     
  2. jcsd
  3. Dec 17, 2014 #2

    jtbell

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    Staff: Mentor

    See the section "History of the atomic mass unit" on this page:

    http://www.sizes.com/units/atomic_mass_unit.htm [Broken]

    (I first went to the Wikipedia page about the atomic mass unit, which doesn't say much about the early history; then followed the "external link" at the end of the article.)
     
    Last edited by a moderator: May 7, 2017
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