Name       : Astatine
Symbol     : At
Atomic #   : 85
Atom weight: 210 (Most stable isotope)
Melting P. : 302
Boiling P. : 337
Oxidation  : 
Pronounced : AS-teh-teen or AS-teh-ten
From       : Greek astatos, "unstable"
Identified : Dale R. Corson, K.R. MacKenzie, and Emilio Segre at the
             University of California
Appearance : Unstable, radioactive halogen
Note       : Earlier suggested name was alabamine
             
[Properties]

  The position of astatine on the periodic chart indicates that it should
share a number of important properties with common iodine. Astatine, 
however, would tend to be somewhat more metallic in its behavior. It is
difficult to describe anything in detail that exists for such a short
period of time in such minute quantities.