caesium nitrate硝酸铯
caesium sulfate硫酸铯
caesium beryl铯绿柱石
Caesium Tungstate氧化钨铯
caesium cycle铯周期
radioactive caesium放射性铂
caesium source铯源
caesium lottomr铯激光器
caesium carbonhmarketing碳酸铯
N（名词） a ductile silvery-white element of the alkali metal group that is the most electropositive metal. It occurs in pollucite and lepidolite and is used in photocells. The radioisotope caesium-137, with a half-life of 30.2 years, is used in radiotherapy. Symbol: Cs; atomic no: 55; atomic wt: 132.90543; valency: 1; relative density: 1.873; melting pt: 28.39±0.01°C; boiling pt: 671°C 铯