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Iridium



Name Iridium
Atomic Number 77
Atomic Weight 192
Symbol Ir
Melting Point ( °C ) 2447' C or 4,436' F
Boiling Point ( °C ) 4,427' F or 8,000' F
Density (g/cm3) 22.42 grams per cubic centimeter
Earth crust (%) 1×10-3 milligrams per kilogram
Discovery (Year) 1803
Group 9
Electron configuration Xe 4f14 5d7 6s2
Ionization energy (eV) 9.1 eV

Iridium was discovered by Smithson Tennant, Antoine Fourcroy, Louis Vanquelin, Hippolyte Collet-Descotils at 1803 in England, France. It has an Atomic # of 77 and is a hard, brittle, lustrous, dense, transition metal of the platinum family. It is silvery-white and it is notable for being the most corrosion resistant element known. It is unaffected by air, water and acids. It is Solid at 298K, Its boiling point is at 8,000' F (4,427' C) and its melting point is at 4,436' F (2,447' C).


Discovery

was discovered by Smithson Tennant, Antoine Fourcroy, Louis Vanquelin, Hippolyte Collet-Descotils at 1803 in England, France

References

Unknown extension tag "references"

http://www.lenntech.com/periodic/elements/ir.htm


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