• Question: What are radioactive isotopes?

    Asked by anon-306342 to Sarah on 15 Dec 2021.
    • Photo: Sarah Lu

      Sarah Lu answered on 15 Dec 2021:

      Different isotopes of the same element have the same number of protons in their atomic nuclei but differing numbers of neutrons.

      Radioisotopes are radioactive isotopes of an element. They are atoms that contain an unstable combination of neutrons and protons, or excess energy in their nucleus.

      Atoms with unstable nuclei regain their stability by shedding excess particles and energy in the form of radiation. This process is called radioactive decay.