名詞 astatine:

1. 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

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(wěn)定放射性元素，在鹵族元素比重最大，在溶解狀態(tài)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(shù)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(wěn)定的] *參見 astasia
-ine 2
-ine2