dubnium
dubnium
Definition
dub·nium (do̵ob′nē əm)
noun
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
Etymology: ModL, after Dubna, Russia, where important work in nuclear physics took place + -ium
