Iridium


 * Element Name:** Iridium


 * Element Symbol:** Ir


 * Atomic Mass:** 192[[image:Iridium-JACQUELINE.png width="216" height="288" align="right"]]


 * Atomic Number:** 77


 * Protons:** 77


 * Electrons:** 77


 * Discovery:** British chemist, Smithson Tennat, discovered it in 1803.


 * How It Was Named:** It was named from the Latin word for rainbow, iris.


 * State of Matter:** Solid


 * Melting Point:** 2446 °C


 * Boiling Point:** 4428 °C

♦ Hard and brittle ♦ Nearly impossible to machine ♦ Light
 * Characteristics:** ♦ Silvery-white color


 * Uses of Element:** In the jewelry industry and making the standard metre bar of Paris


 * Interesting Facts:** A thin layer of Iridium is in a layer of sediment on the world. It's not attacked be any of the acids but by molten salts. Lastly, it is one of the rarest elements in Earth's crust.

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