'ununbium' definitions:
Definition of 'ununbium'
(from WordNet)
noun
Definition of 'ununbium'
From: Elements
- Symbol: Uub
- Atomic number: 112
- Atmic weight: 285
- Ununbium is a IUPAC systematic element name, used until the element receives an accepted name. Ununbium was first created by the GSI in 1996, who have now proposed the permanent name copernicium and the symbol Cn. This name is expected to be officially endorsed by IUPAC in January 2010, after six months for discussion. Element 112 is currently the highest-numbered element to be officially recognised by IUPAC. The most stable isotope discovered to date is 285Uub with a half-life of ~30 s. In total, about 75 atoms of ununbium have been detected using various nuclear reactions. An unconfirmed isotope, 285bUub, has a possible half-life of ~9 minutes, and would be one of the longest-lived superheavy isotopes known to date. Recent experiments strongly suggest that ununbium behaves as a typical member of group 12, demonstrating properties consistent with a volatile metal.