Dubnium
Dubnium
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Dubnium ΒΆ
AtomicNumber: 105
Element: Dubnium
Symbol: Db
AtomicMass: 262.0
NumberofNeutrons: 157
NumberofProtons: 105
NumberofElectrons: 105
Period: 7
Group: 5.0
Phase: artificial
Radioactive: yes
Natural: nan
Metal: yes
Nonmetal: nan
Metalloid: nan
Type: Transactinide
AtomicRadius: nan
Electronegativity: nan
FirstIonization: nan
Density: 39.0
MeltingPoint: nan
BoilingPoint: nan
NumberOfIsotopes: nan
Discoverer: Ghiorso et al.
Year: 1970.0
SpecificHeat: nan
NumberofShells: 7
NumberofValence: nan