Zirconium
Zirconium
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Zirconium ΒΆ
AtomicNumber: 40
Element: Zirconium
Symbol: Zr
AtomicMass: 91.224
NumberofNeutrons: 51
NumberofProtons: 40
NumberofElectrons: 40
Period: 5
Group: 4.0
Phase: solid
Radioactive: nan
Natural: yes
Metal: yes
Nonmetal: nan
Metalloid: nan
Type: Transition Metal
AtomicRadius: 2.2
Electronegativity: 1.33
FirstIonization: 6.6339
Density: 6.51
MeltingPoint: 2125.15
BoilingPoint: 4682.0
NumberOfIsotopes: 20.0
Discoverer: Klaproth
Year: 1789.0
SpecificHeat: 0.278
NumberofShells: 5
NumberofValence: nan