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日期:2024-04-25
relative atomic mass (atomic weight), The ratio of the average mass of the atom to the unified ... Source: Green Book, 2nd ed., p. 41 PAC, 1996, 68, 957 (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) .....
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日期:2024-04-20
Both the terms relative atomic mass and atomic weight are sometimes loosely used to refer to a technically different standardized ... Both terms are officially sanctioned by IUPAC. The term "relative atomic mass" now seems to be gaining as the preferred t...
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日期:2024-04-22
These values remain current until the IUPAC sees the need to revise them. Values given by the [a;b] notation highlights the range of atomic weights for the element. For these elements, the atomic weight is dependent on the physical and chemical history of...
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日期:2024-04-25
Units atomic mass units Notes The table below shows the IUPAC 2007 atomic weights (refs 3-5). Values for elements 110-118 are in references 6-15. The standard atomic weights apply to the elements as they exist naturally on Earth, and the uncertainties tak...
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日期:2024-04-19
Atomic Weights and IUPAC’s Subcommittee for Isotopic Abundance Measurement, and analytical thinker—a long-time friend ... Element name Symbol Atomic number Atomic weight See also Footnotes Table/Figure 16 sulfur S [32.059; 32.076] 6/9 17 chlorine ......
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日期:2024-04-25
The atomic weight A r (E) of element E is defined by the International Union of Pure and Applied Chemistry (IUPAC) as the relative molar mass 12M(E)/M(12 C), where M(E) is the molar mass of the element and M(12 C) is the molar mass of pure carbon-12 ......
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日期:2024-04-22
This version of the Periodic table is based on that recommended by the Commission on the Nomenclature of Inorganic Chemistry and ... Pa, and U) do have a characteristic terrestrial isotopic composition, and for these an atomic weight is tabulated. The nam...