| 单词 | 易拉长 |
| 释义 | 〔palladium〕A soft, ductile, steel-white, tarnish-resistant, metallic element occurring naturally with platinum, especially in gold, nickel, and copper ores. Because it can absorb large amounts of hydrogen, it is used as a purification filter for hydrogen and a catalyst in hydrogenation. It is alloyed for use in electric contacts, jewelry, nonmagnetic watch parts, and surgical instruments. Atomic number 46; atomic weight 106.4; melting point 1,552°C; boiling point 3,140°C; specific gravity 12.02 (20°C); valence 2, 3, 4. See table at element 钯：一种柔软的，易拉长的，银白色的，保持光泽的金属性元素，常与铂共生，尤其在金、镍和铜矿中存在。因为它能吸收大量氢，常用作除氢的过滤器或氢化作用的催化剂。其合金可用于电子接触器、珠宝、无磁性表部件以及外科医用器具。原子序数46；原子量106.4；熔点1,552°C；沸点3,140°C；比重12.02（在20°C时）；化合价2，3，4 参见 element〔platinum〕Symbol Pt A silver-white metallic element occurring worldwide, usually mixed with other metals such as iridium, osmium, or nickel. It is ductile and malleable, does not oxidize in air, and is used as a catalyst and in electrical components, jewelry, dentistry, and electroplating. Atomic number 78; atomic weight 195.09; melting point 1,772°C; boiling point 3,827°C; specific gravity 21.45; valence 2, 3, 4. See table at element 符号 Pt 铂：一种世界范围内存在的银白色金属元素，常与其它金属，如铱、锇或镍混合，易拉长且具延展性的，在空气中不氧化，可用作催化剂，用于电学元件、珠宝，牙科学和电镀中。原子序数78；原子量195.09；熔点1,772°C；沸点3,827°C；比重21.45；化合价2,3,4 参见 element |
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