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Text File  |  1992-09-23  |  416b  |  15 lines
  1.                                    IRIDIUM
  2. Atomic symbol - Ir
  3. Atomic weight - 192.22
  4. Atomic number - 77
  5. Electron configuration - 2-8-18-32-15-2
  6. Oxidation states - +3, +4
  7. State of matter - solid
  8. Heavy metal-ductile
  9. Discovered in 1804 by Smithson Tennant
  10. Boils at 4527 °C, melts at 2410 °C
  11.  
  12. Notes:
  13. Very dense and rare, iridium has a silvery-white color. Its main use is in the 
  14. form of platinum alloys. 
  15.