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-   -   Differing sum of subatomic particles and mass of an atom (https://www.askmehelpdesk.com/showthread.php?t=768444)

  • Sep 23, 2013, 02:04 PM
    purplelove
    Differing sum of subatomic particles and mass of an atom
    Why isn't the sum of the masses of the subatomic particles of an atom equal to the mass of an atom?
  • Sep 24, 2013, 02:25 PM
    neodarwinian
    Hydrogen is..

    1.008 grams/mole

    That is 1.008 grams is 6.022 X 10^23 atoms of hydrogen.

    So, 1 atom of hydrogen..

    1 atom H/6.022 X 10^23 atoms

    = 1.66 X 10^ -24 grams
    ===================the mass of one atom hydrogen. Check that against the one electron mass and one proton mass of hydrogen and see if there is a variance. If so, check back.

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