<page_title> Isotopes of thulium </page_title> <section_title> List of isotopes </section_title> <table> <cell> 145Tm <col_header> nuclide symbol </col_header> <col_header> excitation energy </col_header> </cell> <cell> 144.97007(43)# <col_header> isotopic mass (u) </col_header> </cell> <cell> 179Tm <col_header> nuclide symbol </col_header> <col_header> excitation energy </col_header> </cell> <cell> 178.95534(54)# <col_header> isotopic mass (u) </col_header> </cell> </table>
The isotopes of thulium range in atomic weight from 144.97007 u (¹⁴⁵Tm) to 178.95534 u (¹⁷⁹Tm).