<page_title> Isotopes of strontium </page_title> <section_title> List of isotopes </section_title> <table> <cell> 89Sr <col_header> nuclide symbol </col_header> <col_header> excitation energy </col_header> </cell> <cell> 50.57(3) d <col_header> half-life </col_header> </cell> </table>
The strontium-89 (⁸⁹Sr) has a half-life of 50.57 days.