英语词汇“dubnium”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-新都网

单词	dubnium
释义	dub·ni·um (dbnē-əm) n. Symbol Db An artificially produced radioactive element with atomic number 105. The isotope with mass number 262 has the longest confirmed half-life (35 seconds), although longer half-lifes have been reported for some of its heavier isotopes. See Periodic Table. [After Dubna, Russia, location of the United Institute of Nuclear Research.]
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