Friday, April 05, 2013


  • Astatine is a radioactive chemical element with the chemical symbol At and atomic number 85.
  • It is highly radioactive and is only available in tiny quantities. Its properties are inferred from its position in the periodic table and by studying its chemistry in extremely dilute solutions.
  • It is the least chemically reactive of the halogens and exhibits the most metallic properties of the halogen group.
  • The newly formed astatine-211 is important in nuclear medicine. It can be used for targeted alpha particle radiotherapy

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