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Astatine (At): Fun Facts and Information About the Element


What is the symbol? At
What is the atomic number? 85
What is the atomic weight? 210
What is the melting point in Celsius? 302
What is the boiling point in Celsius? 337
What is the density (g/cm3)?
What year was it discovered? 1940
Who discovered the element? “Dale R. Carson, K.R. MacKenzie and Emilio Segrè”
What group is the element in? 17
What is the electron configuration? [Xe] 4f14 5d10 6s2 6p5
What is the ionization energy? 9.3
What element category is it in? Halogens

Where is Astatine Found?

Astatine can be produced by bombarding bismuth with energetic alpha particles to obtain the relatively long-lived 209-211. At, which can be distilled from the target by heating in air. The total amount of astatine present in the earth’s crust is less than 1 oz.