Fission products are the radioactive atoms that are produced when atomic nuclei split in nuclear reactions. There are several synonyms for the term fission products including radionuclides, radioisotopes, radioactive isotopes, and isotopes. These synonyms all refer to the same type of nuclear waste that is produced when nuclear power plants generate electricity. Fission products can pose a significant threat to public health and the environment, which is why they must be carefully stored and disposed of. The safe and responsible management of fission products is critical to the future of nuclear energy and the protection of people and the planet from the dangers of radiation.