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CD School House 9.0 - Wayzata Technology (1994).iso
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astatine.asc
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1992-09-26
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409b
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14 lines
ASTATINE
Atomic symbol - At
Atomic weight - (209.9871)
Atomic number - 85
Electron configuration - 2-8-18-32-18-7
Oxidation states - ±1, +5, +7
State of matter - solid
Non-metal
Discovered in 1940 by Dale R. Corson and K.R. MacKenzie and Emilio Segrè
Boils at unknown, melts at unknown
Notes:
Astatine is a radioactive element that was sythetically produced.