英语词汇“carbon mass unit”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	carbon mass unit
释义	Carbon Mass Unit Carbon Mass Unit the standard unit of atomic mass, equal to 1/12 the mass of an atom of the carbon isotope ¹²C. Proposed in 1959 by the International Union of Pure and Applied Chemistry (IUPAC), the carbon mass unit was adopted in 1960 by the International Union of Pure and Applied Physics (IUPAP) and ratified at the IUPAC congress in 1961. The unit is equal to (1.66043±0.00031) × 10^–24g.
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Carbon Mass Unit