Isotopes of holmium

Holmium (Ho) has one stable isotope, holmium-165 (Ho-165), which makes up nearly all naturally occurring holmium. In addition to this stable isotope, holmium has several radioactive isotopes, with varying half-lives. The most notable radioactive isotopes of holmium include: 1. **Holmium-163 (Ho-163)** - This isotope is used in various applications, including neutron capture therapy and as a source of gamma radiation.