Radioactive dating radiometric

The unstable or more commonly known radioactive isotopes break down by radioactive decay into other isotopes.Radioactive decay is a natural process and comes from the atomic nucleus becoming unstable and releasing bits and pieces.

This decay process leads to a more balanced nucleus and when the number of protons and neutrons balance, the atom becomes stable.The discovery of by the French physicist, Henri Becquerel, in 1896 paved the way of measuring absolute time.Shortly after Becquerel's find, Marie Curie, a French chemist, isolated another highly radioactive element, .This method is useful for igneous and metamorphic rocks, which cannot be dated by the stratigraphic correlation method used for sedimentary rocks. Some do not change with time and form stable isotopes (i.e.those that form during chemical reactions without breaking down).