Meitnerium
Meitnerium
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Meitnerium ΒΆ
AtomicNumber: 109
Element: Meitnerium
Symbol: Mt
AtomicMass: 268.0
NumberofNeutrons: 159
NumberofProtons: 109
NumberofElectrons: 109
Period: 7
Group: 9.0
Phase: artificial
Radioactive: yes
Natural: nan
Metal: yes
Nonmetal: nan
Metalloid: nan
Type: Transactinide
AtomicRadius: nan
Electronegativity: nan
FirstIonization: nan
Density: 35.0
MeltingPoint: nan
BoilingPoint: nan
NumberOfIsotopes: nan
Discoverer: GSI, Darmstadt, West Germany
Year: 1982.0
SpecificHeat: nan
NumberofShells: 7
NumberofValence: nan