Symbol At Atomic radius: pm - Fusion: kJ/Mole -
Name Astatine Ionic radius: pm - Boiling point: °C -
Atomic number 85 Electron affinity 2.8 Melting point: °C 302
Atomic weight 210.0 1st  ion potential - Specific Heat Cap: J/(g K) -
Classification Metalloid Natural form - Thermal Cond: W/(cm K) 0.02
Configuration [Xe]4f145d106s2p5 Crystal structure - Electrical Cond -
Oxidation states +/-1,3,5,7 Density - Abundance: mg/kg-crust <0.001
Electronegativity 2.2 Vaporization: kJ/Mole -    
Astatine was first synthetically produced in 1940 at the University of California by Dale R. Corson, K.R. MacKenzie, and Emilio Segrč, who bombarded bismuth with accelerated alpha particles to yield astatine and neutrons. Uses -  no uses known