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Elemental composition of the body

  1. Lisa!

    Lisa! 990
    Gold Member

    So when it says that 10% of the body mass consists of Hydrogen, does it mean only 1H(single proton) or it also includes other natural isotopes of hydrogen (deuterium and tritium ) ? I know that 1H is the most common hydrogen isotope with an abundance of more than 99.98%, but I just wanted to know exaactly what it means.

    http://en.wikipedia.org/wiki/Composition_of_the_human_body

    Thanks:smile:
     
  2. jcsd
  3. chemisttree

    chemisttree 3,723
    Science Advisor
    Homework Helper
    Gold Member

    That includes all of the isotopes of hydrogen. It will reflect the isotopic distribution of everything you ingest. I'm not too sure about tritium though. I would hope that particular isotope is present in extremely low concentrations.
     
  4. Lisa!

    Lisa! 990
    Gold Member


    Thank you!:smile:
     
  5. Borek

    Staff: Mentor

    To muddy water - isotopic distribution is not always identical.

    See for example here.

    Not that it is something new, fact that atomic masses of elements are different depending on the source is known for many years.
     
  6. Lisa!

    Lisa! 990
    Gold Member

    hmmm...That's interesting!Thank you:smile:
    Thanks God that I'm not at school anymore:biggrin:
     
  7. chemisttree

    chemisttree 3,723
    Science Advisor
    Homework Helper
    Gold Member

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