Radioactive or radiometric dating
Since all living things contain carbon, carbon-14 is a common radioisotope used primarily to date items that were once living.Carbon-14 has a half-life of approximately 5,730 years and produces the decay product nitrogen-14.
So, to sum this all up, radioactive dating is the process scientists use to conclude the ages of substances dating back several to many years ago by using the isotopes of elements and their half-lives.Radioactive dating enables geologists to record the history of the earth and its events, such as the dinosaur era, within what they call the geologic time scale.Radioactive dating uses the ratios of isotopes and their specific decay products to determine the ages of rocks, fossils, and other substances.An isotope is a variation of an element based upon the number of neutrons.
The disintegration of the neutrons within the atom of the element's nucleus is what scientists call radioactivity.
Each element is made up of atoms, and within each atom is a central particle called a nucleus.