单词 | atomic mass unit |
释义 | atomic mass unit(a.m.u.) A unit of mass used to express relative atomic masses. It is 1/12 of the mass of an atom of the isotope carbon–12 and is equal to 1.66033×10-27kg. This unit superseded both the physical and chemical mass units based on oxygen–16 and is sometimes called the unified mass unit or the dalton |
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