<page_title> Isotopes of astatine </page_title> <section_title> List of isotopes </section_title> <table> <cell> 207At <col_header> nuclide symbol </col_header> <col_header> excitation energy </col_header> </cell> <cell> 1.80(4) h <col_header> half-life </col_header> </cell> <cell> 208At <col_header> nuclide symbol </col_header> <col_header> excitation energy </col_header> </cell> <cell> 1.63(3) h <col_header> half-life </col_header> </cell> <cell> 209At <col_header> nuclide symbol </col_header> <col_header> excitation energy </col_header> </cell> <cell> 5.41(5) h <col_header> half-life </col_header> </cell> <cell> 210At <col_header> nuclide symbol </col_header> <col_header> excitation energy </col_header> </cell> <cell> 8.1(4) h <col_header> half-life </col_header> </cell> <cell> 211At <col_header> nuclide symbol </col_header> <col_header> excitation energy </col_header> </cell> <cell> 7.214(7) h <col_header> half-life </col_header> </cell> </table>
In total, only five isotopes of astatine have half-lives exceeding one hour, those between 207 and 211.