Hafnium
Hafnium
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Hafnium ΒΆ
AtomicNumber: 72
Element: Hafnium
Symbol: Hf
AtomicMass: 178.49
NumberofNeutrons: 106
NumberofProtons: 72
NumberofElectrons: 72
Period: 6
Group: 4.0
Phase: solid
Radioactive: nan
Natural: yes
Metal: yes
Nonmetal: nan
Metalloid: nan
Type: Transition Metal
AtomicRadius: 2.2
Electronegativity: 1.3
FirstIonization: 6.8251
Density: 13.3
MeltingPoint: 2500.15
BoilingPoint: 4876.0
NumberOfIsotopes: 17.0
Discoverer: Coster and von Hevesy
Year: 1923.0
SpecificHeat: 0.144
NumberofShells: 6
NumberofValence: nan