| 单词 | dubnium |
| 释义 | dubnium dub.ni.um AHD: [d›b“n¶-…m] D.J. [6du8bni8*m]K.K. [6dubni*m]n.Symbol Db （名词）符号 Db An artificially produced radioactive element with atomic number 105 whose most long-lived isotopes have mass numbers of 258, 261, 262, and 263 with half-lives of 4.2, 1.8. 34, and 30 seconds, respectively.Also called unnilpentium ：人造放射性元素，原子序数号为105，生命期最长同位素的质量为258、261、262和263，半衰期分别为4.2秒、1.8秒、34秒和30秒也作 unnilpentium语源:After Dubna , Russia, the location of the United Institute of Nuclear Research After Dubna , Russia, the location of the United Institute of Nuclear Research |
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