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Elemental composition of the body

  1. Dec 20, 2010 #1

    Lisa!

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    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. Dec 20, 2010 #2

    chemisttree

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    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. Dec 21, 2010 #3

    Lisa!

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    Thank you!:smile:
     
  5. Dec 21, 2010 #4

    Borek

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    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. Dec 21, 2010 #5

    Lisa!

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    hmmm...That's interesting!Thank you:smile:
    Thanks God that I'm not at school anymore:biggrin:
     
  7. Dec 21, 2010 #6

    chemisttree

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