astatine
音標['?st?ti:n] 讀音漢語翻譯
n. 砹
【化】 砹At
【醫】 砹(85號元素)
詞型變化:
簡寫符號:At英文解釋:
名詞 astatine:
- a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium同義詞:At, atomic number 85
詳細解釋:
as.ta.tine
n.Symbol At (名詞)符號 At A highly unstable radioactive element, the heaviest of the halogen series, that resembles iodine in solution. Its longest lived isotope has a mass number of 20 and has a half-life of 8.3 hours. Atomic number 85; melting point 302=C; boiling point 337=C; valence probably , 3, 5, 7.See table at element 砹:極不穩定放射性元素,在鹵族元素比重最大,在溶解狀態與碘相象,它最長周期的同位素原子量為20,半衰期為8.3小時。原子序數85;溶點302=C;沸點337=C;化合價可能為、3、5、7參見 element
來源:Greek astatos [unstable] * see astasia 希臘語 astatos [不穩定的] *參見 astasia-ine 2-ine2
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