Röntgenium

Kemiallinen merkki: Rg
Järjestysluku: 111
Kategoria: siirtymämetallit
Ryhmä: 11
Jakso: 7
Lohko: d
Moolimassa: [280] g/mol
Elektronia kuorilla: 2, 8, 18, 32, 32, 17, 2
CAS-numero: 54386-24-2
Olomuoto: oletettavasti kiinteä
Tiheys: unknown
Sulamispiste: unknown
Kiehumispiste: unknown
Kiderakenne: unknown
Hapetusluvut: 3 (expected)
Elektronegatiivisuus: unknown
Nimen alkuperä: Röntgen
Nimen tarkoitus: the German physicist Wilhelm Conrad Röntgen
Faktoja:
- is a synthetic element
- its most stable known isotope has a mass of 283 amu and an estimated half-life of ten minutes
- was found by Peter Armbruster, Gottfried Münzenberg, and their team working at the Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany on December 8, 1994, but the IUPAC/IUPAP Joint Working Party (JWP) concluded that there w for the discovery at that moment in time
- the GSI team repeated their experiment in 2000 and detected a further 3 atoms, and in their 2003 report, the JWP decided that the GSI team should be acknowledged as the discoverers