Iridium
Iridium
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Iridium ΒΆ
AtomicNumber: 77
Element: Iridium
Symbol: Ir
AtomicMass: 192.217
NumberofNeutrons: 115
NumberofProtons: 77
NumberofElectrons: 77
Period: 6
Group: 9.0
Phase: solid
Radioactive: nan
Natural: yes
Metal: yes
Nonmetal: nan
Metalloid: nan
Type: Transition Metal
AtomicRadius: 1.9
Electronegativity: 2.2
FirstIonization: 8.967
Density: 22.6
MeltingPoint: 2716.15
BoilingPoint: 4701.0
NumberOfIsotopes: 25.0
Discoverer: Tennant
Year: 1804.0
SpecificHeat: 0.131
NumberofShells: 6
NumberofValence: nan