dubnium
[ doob-nee-uh m, duhb- ]
/ ˈdub ni əm, ˈdʌb- /
noun Chemistry, Physics.
a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Db; atomic number: 105.
Formerly
hahnium,
unnilpentium,
element 105.
Origin of dubnium
named after
Dubna, the town in Russia where it was first produced; see
-ium
Words nearby dubnium
dublin,
dublin bay prawn,
dubliner,
dubliners,
dubna,
dubnium,
dubois,
dubois abscesses,
dubois, w. e. b.,
dubonnet,
dubos
British Dictionary definitions for dubnium
dubnium
/ (ˈdʌbnɪəm) /
noun
a synthetic transactinide element produced in minute quantities by bombarding plutonium with high-energy neon ions. Symbol: Du; atomic no 105
See hahnium
Word Origin for dubnium
C20: after
Dubna, where it was first reported
Scientific definitions for dubnium
dubnium
[ dōōb′nē-əm ]
Db
A synthetic, radioactive element that is produced from californium, americium, or berkelium. Its 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. Atomic number 105. See Periodic Table.