francium has 36 isotopes, but only francium-223 occurs in nature. Francium-223 spontaneously emits particles and energy, so francium-223 is a (an) of francium.
Question: Francium has 36 isotopes, but only francium-223 occurs in nature. Francium-223 spontaneously emits particles and energy, so francium-223 is a (an) of francium. Answer: Francium-233 is a radioisotope
Radioisotopes are radioactive isotopes since they contain unstable nucleus and thus emit energy and particles when it changes to a more stable form.
Radioactive isotopes have an unstable nucleus that decays or emits excess energy or radiation until the nucleus becomes stable. They can be naturally occurring or artificial isotopes of an element.
Francium-223 is an example of radioactive isotope of Francium element.
