Astatine 砹

（重定向自Alabamine）

Structure of astatine monoiodide, one of the astatine interhalogens and the heaviest known diatomic interhalogen.

Periodic table by Mendeleev (1971), with astatine missing below chlorine, bromine and iodine ("J")

Emilio Segrè, one of the discoverers of astatine

Astatine is a radioactive chemical element with the chemical symbol At and atomic number 85, and is the rarest natural element on the Earth's crust. It occurs on Earth as the decay product of various heavier elements. All its isotopes are short-lived; the most stable is astatine-210, with a half-life of 8.1 hours. Elemental astatine has never been viewed because any macroscopic sample would be immediately vaporized by its radioactive heating. It has yet to be determined if this obstacle could be overcome with sufficient cooling.

单词	alabamine
释义	alabamine /ˌælə'bæmiːn/ 英汉-汉英词典 n. 砬(元素砹) 词组 \| 习惯用语您要查找的是不是： calamine n. 异极石；炉甘石 albumin n. 白蛋白，清蛋白 Alabamian n. 阿拉巴马州人; adj. 阿拉巴马州的 Alabaman n. 阿拉巴马州人 alabamine n. 元素砹（ astatine ）的旧名英语百科 Astatine 砹（重定向自Alabamine） Astatine is a radioactive chemical element with the chemical symbol At and atomic number 85, and is the rarest natural element on the Earth's crust. It occurs on Earth as the decay product of various heavier elements. All its isotopes are short-lived; the most stable is astatine-210, with a half-life of 8.1 hours. Elemental astatine has never been viewed because any macroscopic sample would be immediately vaporized by its radioactive heating. It has yet to be determined if this obstacle could be overcome with sufficient cooling.
随便看	cerebrotendineous cerebrotendinous cerebrotendinous xanthomathosis Cerebrotendinous Xanthomatoses Cerebrotendinous Xanthomatosis cerebrotomia cerebrotomy cerebrotonia cerebrotonia type cerebrotonic cerebrotonic mixtures cerebrotonin cerebrotrofina cerebrovascular cerebrovascular accidence electrardiogram chage Cerebrovascular Accident,Acute cerebrovascular accident Cerebrovascular Accidents,Acute cerebrovascular aciident Cerebrovascular amyloidosis Cerebrovascular Angiograhy Cerebrovascular Apoplexy Cerebrovascular circulation cerebrovascular complication cerebrovascular dementia

alabamine /ˌælə'bæmiːn/

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Astatine 砹