a radioactive chemical element with a very short half-life: a transactinide produced by bombarding californium or berkelium with high-energy nuclear particles: symbol, Db; at. no. 105
Origin of dubniumModL, after Dubna, Russia, where important work in nuclear physics took place + -ium
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.
Origin of dubniumAfter Dubna, Russia, location of the United Institute of Nuclear Research.
- A transuranic chemical element (symbol Db) with atomic number 105.
Named after Dubna in Russia.