Ma3d2blbcfany
Ma3d2blbcfany Ma3d2blbcfany
  • 15-08-2016
  • Chemistry
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one twelfth of the mass of a carbon-12 atom is used to define a

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skyp
skyp skyp
  • 16-08-2016
it's used to define an atomic mass unit (1amu)
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