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Download unified atomic mass unit
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unified atomic mass unit Non-SI unit of mass (equal to the atomic mass constant), defined as one twelfth of the mass of a carbon-12 atom in its ground state and used to express masses of atomic particles, u ≈ 1.660 5402(10) × 10–27 kg. G.B. 75; 1996, 68, 997 IUPAC Compendium of Chemical Terminology 2nd Edition (1997)
