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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.
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