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单词 dubnium
释义
dub·ni·um (dbnē-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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更新时间:2025/1/8 14:57:36