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Principles of isotopic dating Radiometric datingradioactive dating or radioisotope dating is a technique which is used to date materials such as Isotope age dating formula or carbonin which trace radioactive impurities were selectively incorporated when they were formed. The method compares the abundance of a naturally occurring radioactive isotope within the material to the abundance of its decay products, which form at a known constant rate of decay. Together with stratigraphic principlesclick dating methods are used in geochronology to establish the geologic time scale. Radiometric dating is also used to date archaeological materials, including ancient artifacts. Different methods of Isotope age dating formula dating vary in the timescale over which they are accurate and the materials to which they can be applied. A particular isotope of a particular element is called a nuclide. Some nuclides are inherently unstable. Whats It Like Dating A 40 Year Old Man All absolute isotopic ages are based on radioactive decay , a process whereby a specific atom or isotope is converted into another specific atom or isotope at a constant and known rate. For a single element, these atoms are called isotopes. Because isotopes differ in mass , their relative abundance can be determined if the masses are separated in a mass spectrometer see below Use of mass spectrometers.

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    A technician of the U. Geological Survey uses a mass spectrometer to determine the proportions of neodymium isotopes contained in a sample of igneous rock. Cloth wrappings from a mummified bull Samples taken from a pyramid in Dashur, Egypt.

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