Praseodymium
Praseodymium
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Praseodymium ΒΆ
AtomicNumber: 59
Element: Praseodymium
Symbol: Pr
AtomicMass: 140.908
NumberofNeutrons: 82
NumberofProtons: 59
NumberofElectrons: 59
Period: 6
Group: nan
Phase: solid
Radioactive: nan
Natural: yes
Metal: yes
Nonmetal: nan
Metalloid: nan
Type: Lanthanide
AtomicRadius: 2.7
Electronegativity: 1.13
FirstIonization: 5.473
Density: 6.77
MeltingPoint: 1204.15
BoilingPoint: 3793.0
NumberOfIsotopes: 15.0
Discoverer: von Welsbach
Year: 1885.0
SpecificHeat: 0.193
NumberofShells: 6
NumberofValence: nan