Isotopes /ˈaɪ.sə.təʊp/ – (iso.. and Greek topos – place) are one of the chemical elements in which the number of protons in atomic nuclei is the same, but the number of neutrons is different. Isotopes are widely used as a source of nuclear radiation.
Ex. Isotopes of carbon, such as carbon-12 and carbon-14, have different numbers of neutrons despite sharing the same number of protons, leading to distinct properties and applications.