radium

导读:单词音标
radium音标[\'reidiәm]
汉语翻译n. 镭【化】 镭Ra【医】 镭(88号元素)词型变化简写符号:Ra英语解释名词 radium:an intensely radioactive metallic element that

单词音标

radium音标[\'reidiәm]

汉语翻译

n. 镭

【化】 镭Ra

【医】 镭(88号元素)

词型变化

简写符号:Ra

英语解释

名词 radium:

an intensely radioactive metallic element that occurs in minute amounts in uranium ores

同义词:Ra, atomic number 88

例句

Tell me when radium was found.

告诉我镭是什么时候被发现的。

Radium and uranium are radioactive elements.

镭和铀是放射性元素。

详细解释

ra.di.um

n.Symbol Ra (名词)符号 Ra

A rare, brilliant white, luminescent, highly radioactive metallic element found in very small amounts in uranium ores, having 3 isotopes with mass numbers between 23 and 230, of which radium 22\' with a half-life of ,\'22 years is the most common. It is used in cancer radiotherapy, as a neutron source for some research purposes, and as a constituent of luminescent paints. Atomic number 88; melting point 700=C; boiling point ,737=C; valence 2.See table at element

镭:一种稀有的、有白色光泽、发光、高度放射性的金属元素,极少量地存在于沥青矿中,有3种同位素,质量数介于23和230之间,*常见的为镭22\',半衰期为,\'22年。镭可用于癌症的放射治疗,在其它一些研究中用作中子源,还可用作发光颜料的成分。原子序数88;熔点700=C;沸点,737=C;原子价2参见 element

来源:

Latin radius [ray]

拉丁语 radius [射线]

-ium

-ium

real-life
reluctance
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