Radioactive isotope

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A radioactive isotope, or radioisotope, is an isotope in whose atom the nucleus is not stable.[1]

Radioactive isotopes have many applications in science and medicine. One application is carbon 14 dating.[2] This allows scientists to estimate the age of the remains of once-living things up to tens of thousands of years old.


  1. Wile, Jay L. Exploring Creation With Physical Science. Apologia Educational Ministries, Inc. 1999, 2000