| Protons and neutrons have masses of approximately 1 atomic mass unit each, whereas electrons only have a mass of.0006 amu. |
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| A Dalton, also known as an atomic mass unit, is roughly the mass of a single proton or neutron. |
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| Hence, 0.02928 atomic mass unit, or 0.7 percent of the original mass, has disappeared. |
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| Based on this information, in addition to the known relative atomic mass and elemental charge, the atomic mass unit could be established. |
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| At the other end, an atomic mass unit equals 1.66 yoctograms. |
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| The term heavy charged particle refers to those energetic particles whose mass is one atomic mass unit or greater. |
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| The atomic mass unit is equal to 1.66·10-24 g or one-twelfth of the mass of a carbon atom. |
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| Because of the definition of the unified atomic mass unit, each carbon-12 atom has an atomic mass of exactly 12 u, and so a mole of carbon-12 atoms weighs exactly 0.012 kg. |
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