中文翻译与英英解释 | a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
同义词：At, atomic number 85,
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| Astatine is a radioactive chemical element with the chemical symbol At and atomic number 85. It occurs on Earth only as the result of the radioactive decay of certain heavier elements. |
例句与用法 | 1. | astatine should have the greatest tendency to form cations.
砹应该具有形成阳离子最大的倾向。
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