What a radioisotope is and why they have unstable nuclei. Elements in which all of the isotopes are radioactive.
Explains isotope stability and different kinds of nuclear decay.
Examines carbon isotopes and how carbon-14 can be used to determine how long ago an organism died.
Reviews the definition of radioisotope, why radioisotopes have unstable nuclei, and which elements have only radioactive isotopes.
Radioactive elements have a variety of uses beyond nuclear power and energy.