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BookmarkIridium is a chemical element in the periodic table that has the symbol Ir and atomic number 77.
A dense, very hard, brittle, silvery-white transition metal of the platinum family, iridium is used in high strength alloys that can withstand high temperatures and occurs in natural alloys with platinum or osmium.
Iridium is notable for being the most corrosion resistant element known and for its association with the demise of the dinosaurs..
For more information about the topic Iridium, read the full article at Wikipedia.org, or see the following related articles:
Platinum — Platinum is a chemical element in the periodic table that has the symbol Pt and atomic number 78. A heavy, malleable, ductile, precious, grey-white ... > read more
Transition metal — The term transition metal (sometimes also called a transition element) commonly refers to any element in the d-block of the periodic table, including ... > read more
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