Symbol: Db
Atomic number: 105
Category: transition metals
Group: 5
Period: 7
Block: d
Atomic weight: [268] g/mol
Electrons per shell: 2, 8, 18, 32, 32, 11, 2
CAS number: 53850-35-4
Phase: presumably solid
Density: unknown
Melting point: unknown
Boiling point: unknown
Crystal structure: unknown
Oxidation states: 5
Electronegativity: unknown
Name's origin: Dubna
Name's meaning: the city that contains the Russian Joint Institute for Nuclear Research where the element was found
- its most stable isotope is dubnium-268 with a half life of 28 hours
- before dubnium received its current name, some candidates were hahnium (after the German physicist Otto Hahn), nielsbohrium (after the Danish nuclear physicist Niels Bohr) and joliotium (after the French physicist Frédéric Joliot-Curie)