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Text File  |  1992-09-26  |  409b  |  14 lines
  1.                                    ASTATINE
  2. Atomic symbol - At
  3. Atomic weight - (209.9871)
  4. Atomic number - 85
  5. Electron configuration - 2-8-18-32-18-7
  6. Oxidation states - ±1, +5, +7
  7. State of matter - solid
  8. Non-metal
  9. Discovered in 1940 by Dale R. Corson and K.R. MacKenzie and Emilio Segrè
  10. Boils at unknown, melts at unknown
  11.  
  12. Notes:
  13. Astatine is a radioactive element that was sythetically produced. 
  14.