astatine
英 ['æstətiːn]
美['æstətin]
- n. [化学] 砹（化学元素At）
英英释义
- 1. a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
中文词源
astatine 砹
前缀a-, 不，非。词根st, 站立，稳定。指该化学元素不稳定。
英文词源
- astatine (n.)
- radioactive element, named 1947, from Greek astatos "unstable" (see astatic) + chemical suffix -ine (2). So called for its short half-life and lack of stable isotopes. "The element appears not to have a stable form and probably does not exist in nature" [Flood, "Origin of Chemical Names"].