Definiton of radiometric dating joods dating

a type of radiometer consisting of an evacuated glass bulb containing a set of lightweight vanes, each blackened on one side.

The dating of rocks (and also fossils and archeological remains) by the accurate determination of the quantities of a long-lived radioactive isotope and its stable decay product in a sample.

Half-lives must therefore be known with great accuracy for precise dating and should range from about 10 years.Together with stratigraphic principles, radiometric dating methods are used in geochronology to establish the geological time scale.Among the best-known techniques are radiocarbon dating, potassium-argon dating and uranium-lead dating.All ordinary matter is made up of combinations of chemical elements, each with its own atomic number, indicating the number of protons in the atomic nucleus.Additionally, elements may exist in different isotopes, with each isotope of an element differing in the number of neutrons in the nucleus.

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