| 单词 | 化学性质 |
| 释义 | 〔colligative〕Depending on the quantity of molecules but not on their chemical nature:依数性：取决于分子的数量而非其化学性质：〔ammonium〕The univalent chemical ion NH4+, derived from ammonia, whose compounds chemically resemble the alkali metals. 铵：从氨中衍生而来的单价化学离子NH4+，其化合物在化学性质上类似碱金属 〔nonmetal〕Any of a number of elements, such as oxygen or sulfur, that lack the physical and chemical properties of metals.非金属：一种元素，如氧或硫，其没有金属的物理和化学性质〔unstable〕Highly or violently reactive.化学性质极为活泼的〔chemistry〕The composition, structure, properties, and reactions of a substance.化学性质：物质的组成、结构、属性及反应〔protactinium〕A rare, extremely toxic, radioactive element chemically similar to uranium, having 13 known isotopes, the most common of which is protactinium 231 with a half-life of 32,480 years. Atomic number 91; melting point 1,230°C; specific gravity 15.37; valence 4, 5. See table at element 镤：一种稀有的、剧毒放射性元素，在化学性质上与铀相似。有十三个已知的同位素，其中最常见的是半衰期为32,480年的镤231。原子序数为91；熔点1,230°C；比重15.37；原子价4, 5 参见 element〔butyraceous〕Resembling butter in appearance, consistency, or chemical properties.似乳油的，奶油状的：在外观、稠密度和化学性质上象奶油一样的〔coefficient〕A numerical measure of a physical or chemical property that is constant for a system under specified conditions such as the coefficient of friction.系数，率：物理或化学性质的数值度量，在规定条件下对于一个系统来说它是常量，例如摩擦系数 |
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