<page_title> Isotopes of osmium </page_title> <section_title> List of isotopes </section_title> <table> <cell> 191mOs <col_header> nuclide symbol </col_header> <col_header> excitation energy </col_header> </cell> <cell> 13.10(5) h <col_header> half-life </col_header> </cell> </table>
¹⁹¹ᵐOs has a half-life of 13.10 hours.