A radioactive isotope is an isotope of an element radiating during its decay to a stable form. All isotopes have the same number of protons, however different isotopes may have differing numbers of neutrons.

RADIOACTIVE ISOTOPE: "The radioactive isotope was vital to the development of radioactive therapy."
Cite this page: N., Pam M.S., "RADIOACTIVE ISOTOPE," in, April 28, 2013, (accessed May 10, 2021).