Radioisotopes are naturally occurring or artificially produced atoms that emit radiation. These isotopes are used in various fields such as medical, industrial, and scientific research. Some synonyms for radioisotopes include radionuclides, radioactive isotopes, and isotopes with unstable nuclei. Other terms can be used depending on the specific type of radioisotope or the field in which it is used, such as cobalt-60 for medical radiation therapy or neutron activation analysis for scientific research. Regardless of the terminology used, radioisotopes play a crucial role in many aspects of modern society and continue to be an area of active research and development.