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释义 | 〔meitnerium〕An artificially produced radioactive element with atomic number 109 whose most long-lived isotopes have mass numbers of 266 and 268 with half-lives of 3.4 milliseconds and 70 milliseconds, respectively. Also called unnilennium :人工产生的放射性元素,原子序数号为109,生命期最长同位素的质量为266和268,半衰期分别为3.4毫秒和70毫秒 也作 unnilennium〔bohrium〕An artificially produced radioactive element with atomic number 107 whose most long-lived isotopes have mass numbers of 261, 262, and 264 with half-lives of 11.8 milliseconds, 0.1 seconds, and 0.44 seconds, respectively. Also called unnilseptium :人工产生的放射性元素,原子序数号为107,生命期最长同位素的质量为261、262和264,半衰期分别为11.8毫秒、0.1秒和0.44秒 也作 unnilseptium〔hassium〕An artificially produced radioactive element with atomic number 108 whose most long-lived isotopes have mass numbers of 264 and 265 with half-lives of 0.08 milliseconds and 2 milliseconds, respectively. Also called unniloctium :人造放射性元素,原子序数号为108,生命期最长同位素的质量为264和265,半衰期分别为0.08毫秒和2毫秒 也作 unniloctium |
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