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Astatine

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Astatine is a highly unstable radioactive element, the heaviest of the halogen series and resembling iodine in solution.[1]

Properties

  • Atomic number: 85
  • Atomic Weight: 210
  • Melting point: 575 K (302°C or 576°F)
  • Boiling point: Unknown
  • Density: about 7 grams per cubic centimeter
  • Phase at room temperature: Solid
  • Element classification: Semi-metal
  • Period number: 6
  • Group number: 17
  • Group name: Halogen[2]

References

  1. http://www.answers.com/topic/astatine
  2. http://education.jlab.org/itselemental/ele085.html
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