| 单词 | relative atomic mass |
| 释义 | > as lemmasrelative atomic mass relative atomic mass n. chiefly Physics = atomic mass n.; also called atomic weight. ΘΚΠ the world > matter > physics > atomic physics > [noun] > atomic weight atomic weight1819 equivalent number1826 atomic mass1884 relative atomic mass1892 1892 A. A. Bennett Text-bk. Inorg. Chem. i. 199 It is evident that its [sc. the atom's] mass according to our common standards of mass measure cannot be determined, since the number of these units in a given portion of matter has not been..determined. Hence only relative atomic masses can be determined. 1902 J. C. Hessler & A. L. Smith Ess. Chem. xvi. 232 Relative atomic masses imply a standard; the standard atomic mass, that of oxygen, is assumed to be exactly 16. 1983 G. C. Hill & J. S. Holman Chem. in Context (ed. 2) i. 4 The relative atomic mass of magnesium, on the carbon-12 scale is 24.312. 2000 M. Clugston & R. Flemming Adv. Chem. iii. 29 Relative atomic masses are known with great precision, usually to at least three decimal places. < as lemmas |
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