| 单词 | 原子数 |
| 释义 | 〔atomicity〕The number of atoms in a molecule.原子数，原子价，化合价：单质分子中的原子数〔thulium〕A bright, silvery rare-earth element obtained commercially from monazite, having an x-ray emitting isotope that is used in small portable medical x-ray units. Atomic number 69; atomic weight 168.934; melting point 1,545°C; boiling point 1,727°C; specific gravity 9.3; valence 2, 3. See table at element 铥：一种商业上可从独居石中提取的亮银色稀土元素。它有一种可以释放X射线的同位素，用于小型便携式医疗X射线设备。原子数69；原子量168.934；熔点1,545°C；沸点1,727°C；比重9.3；化合价2,3 参见 element〔saccharide〕Any of a series of compounds of carbon, hydrogen, and oxygen in which the atoms of the latter two elements are in the ratio of 2:1, especially those containing the group C6H 10O 5. 糖化物：由碳、氢和氧组成的化合物，氢氧的原子数比例是2:1，尤指含有C6H 10O 5的物质 〔mole〕The amount of a substance that contains as many atoms, molecules, ions, or other elementary units as the number of atoms in 0.012 kilogram of carbon 12. The number is 6.0225 × 1023, or Avogadro's number. Also called gram molecule 摩尔：包括许多原子、分子、离子或其它成分单位，其原子数在0.012克碳12的一种物质的量。数字是6.0225×1023，或为阿佛加德罗数 也作 gram molecule〔xenon〕A colorless, odorless, highly unreactive gaseous element found in minute quantities in the atmosphere, extracted commercially from liquefied air and used in stroboscopic, bactericidal, and laser-pumping lamps. Atomic number 54; atomic weight 131.30; melting point -111.9°C; boiling point -107.1°C; density (gas) 5.887 grams per liter; specific gravity (liquid) 3.52 (-109°C). See table at element 氙：一种无色、无味、高度惰性的气体元素，在大气中含量极少，可以从液态空气中分离得到，用于频闪观测灯、杀菌灯和镭射充能灯中。原子数为54；原子量为131.30；熔点-111.9°C；沸点-107.1°C；每升纯氙重5.887克；比重（液体）3.52（在-109°C时） 参见 element〔fluorine〕A pale-yellow, highly corrosive, poisonous, gaseous halogen element, the most electronegative and most reactive of all the elements, used in a wide variety of industrially important compounds. Atomic number 9; atomic weight 18.9984; freezing point -219.62°C; melting point -223°C; boiling point -188.14°C; specific gravity of liquid 1.108 (at boiling point); valence 1. See table at element 氟：一种浅黄色、强腐蚀性、有毒的气态卤素，是带有最强的负电性和最强抗电性的元素，被广泛应用于多种重要的工业化合物中。原子数为9；原子量为18.9984；凝点为-219.62°C；溶点为-223°C；沸点为-188.14°C；特定液态引力为1.108（于沸点）；原子价为1 参见 element |
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