Lutetium
Lutetium
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Lutetium ΒΆ
AtomicNumber: 71
Element: Lutetium
Symbol: Lu
AtomicMass: 174.967
NumberofNeutrons: 104
NumberofProtons: 71
NumberofElectrons: 71
Period: 6
Group: nan
Phase: solid
Radioactive: nan
Natural: yes
Metal: yes
Nonmetal: nan
Metalloid: nan
Type: Lanthanide
AtomicRadius: 2.3
Electronegativity: 1.27
FirstIonization: 5.4259
Density: 9.84
MeltingPoint: 1936.15
BoilingPoint: 3675.0
NumberOfIsotopes: 22.0
Discoverer: Urbain/ von Welsbach
Year: 1907.0
SpecificHeat: 0.154
NumberofShells: 6
NumberofValence: nan