astatine : Dictionary / Wörterbuch (BEOLINGUS, TU Chemnitz)

English Dictionary: astatine	by the DICT Development Group
2 results for astatine
From WordNet (r) 3.0 (2006) [wn]:
astatine n a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium Synonym(s): astatine, At, atomic number 85
From The Elements (22Oct97) [elements]:
astatine Symbol: At Atomic number: 85 Atomic weight: (210) Radioactive halogen element. Occurs naturally from uranium and thorium decay. At least 20 known isotopes. At-210, the most stable, has a half-life of 8.3 hours. Synthesized by nuclear bombardment in 1940 by D.R. Corson, K.R. MacKenzie and E. Segre at the University of California.