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Mass difinition and protons

  1. May 4, 2010 #1
    my question is
    Does 1 kg of iron contain the same number of protons as 1kg of aluminium,hydrogen and wood
    Can we define mass of matter with no of protons and neutrons it contains?
     
    Last edited: May 4, 2010
  2. jcsd
  3. May 4, 2010 #2

    tiny-tim

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    Hi bolbol2054! :smile:

    A neutron weighs almost exactly the same as a proton, and most elements have more neutrons than protons, so you would have to define mass of matter with the number of protons and neutrons (P + N) it contains.

    If you did, it would be pretty accurate …

    the errors (due to "binding energy") would be well under 1%: see the tables in http://en.wikipedia.org/wiki/Bindin..._experimentally_measured_atom_nuclide_masses" for some detailed figures. :wink:
     
    Last edited by a moderator: Apr 25, 2017
  4. May 6, 2010 #3
    thank you sir
     
  5. May 6, 2010 #4

    tiny-tim

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    don't call me sir!

    i'm only a little goldfish! :biggrin:
     
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