单词 | 摩擦阻力 |
释义 | 〔cadmium〕A soft, bluish-white metallic element occurring primarily in zinc, copper, and lead ores, that is easily cut with a knife and is used in low-friction, fatigue-resistant alloys, solders, dental amalgams, nickel-cadmium storage batteries, nuclear reactor shields, and in rustproof electroplating. Atomic number 48; atomic weight 112.40; melting point 320.9°C; boiling point 765°C; specific gravity 8.65; valence 2. See table at element 镉:一种质软的,蓝白色的金属元素,最初存在于锌矿、铜矿和铅矿之中,这种金属易于用刀切割,用于制造低摩擦阻力和耐疲劳的合金、焊料、牙科用的混合填料、镍镉蓄电池、核反应堆防护层和防锈电镀之中。原子序数48;原子量112.40;熔点320.9°C;沸点765°C;比重8.65;原子价2 参见 element |
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