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单词 锕类
释义 〔nobelium〕A radioactive transuranic element in the actinide series, artificially produced in trace amounts. Its longest-lived isotope is No 255 with a half-life of 3 minutes. Atomic number 102. See table at element 锘:在锕类元素中的一种放射性超铀元素,人工微量制造,其最长寿命的同位素是锘255,其半衰期为三分钟,原子序数102 参见 element〔actinide〕Any of a series of chemically similar, radioactive elements with atomic numbers ranging from 89 (actinium) through 103 (lawrencium).锕类:任何化学性质相似,原子序数在89(锕)与103(铹)之间变化的放射性元素
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