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Text File  |  1992-09-26  |  467b  |  15 lines
  1.                                    THALLIUM
  2. Atomic symbol - Tl
  3. Atomic weight - 204.3833
  4. Atomic number - 81
  5. Electron configuration - 2-8-18-32-18-3
  6. Oxidation states - +1, +3
  7. State of matter - solid
  8. Heavy metal-low melting
  9. Discovered in 1861 by Sir William Crookes
  10. Boils at 1457 °C, melts at 303.5 °C
  11.  
  12. Notes:
  13. Thallium is poisonous and has few uses. It has a metallic lustre that dulls to 
  14. bluish gray in air. Two crystalline forms of thallium are known. 
  15.