Radioisotopes

**Definition:** Isotopes that exhibit radioactivity and undergo radioactive decay. (From Grant & Hackh's Chemical Dictionary, 5th ed & McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

**Tree numbers:** - D01.496.749

**Synonyms:** - Radionuclides - Radioactive Isotopes - Radioisotope - Radioactive Isotope - Radionuclide