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francium
[ˈfrænsiəm] [ˈfrænsiəm]

  • n. 元素钫

网络释义专业释义英英释义

  [化学]

Francium)(台湾称鍅,旧译作鉣、錺)是一种化学元素,它的化学符号是Fr,它的原子序数是87,带有放射性。

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短语

eka francium 类钫

francium oxide [无化] 氧化钫

francium isotope [核] 钫同位素

Francium Carbide 钫碳化物

francium compounds 钫化合物

Fr Francium

francium compound [无化] 钫化合物

Isotopes of francium 钫的同位素

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·2,447,543篇论文数据,部分数据来源于NoteExpress

francium [ 'frænsiəm ]

  • n. a radioactive element of the alkali-metal group discovered as a disintegration product of actinium

    同义词: Fr atomic number 87

以上来源于: WordNet

 柯林斯英汉双解大词典 

francium /ˈfrænsɪəm/

  • 1. 

    N an unstable radioactive element of the alkali-metal group, occurring in minute amounts in uranium ores. Symbol: Fr; atomic no: 87; half-life of most stable isotope, 223Fr: 22 minutes; valency: 1; melting pt: 27°C; boiling pt: 677°C 钫

双语例句

  • Even Francium's most stable isotope, Francium-223 only has a half-life of 22 minutes.

    稳定同位素- 223也只有22分钟半衰期

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  • Because Francium is mainly only found synthetically in laboratory research, it has no known use outside of the laboratory.

    由于主要实验室研究中产生,实验室外没有已知用途

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  • Gallium is solid at room temperature but will melt if held in your hand, caesium (Cs), and francium (Fr) ?the second rarest naturally occurring element, can also be liquid at or near room temperature.

    金属镓室温固体状态但是把它放在手上就会融化,金属元素钫这些比较稀有元素室温或者接近室温的情况下液体状态的。

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