Sufficient quantities were obtained so that some of its properties can be studied. However, a cyclotron must be used to synthesize astatine. So, this makes it very expensive and limits its application and study.
All isotopes of astatine are radioactive.
At with a half-life of 8.3 hours and decays mainly by electron capture . Shown above is a recording of the detection of astatine in the notebook of its discoverer, D. R. Corson, an American physicist.