Definition of radiometric dating Completely free online sex dating
any method of determining the age of earth materials or objects of organic origin based on measurement of either short-lived radioactive elements or the amount of a long-lived radioactive element plus its decay product.
A method for determining the age of an object based on the concentration of a particular radioactive isotope contained within it.
For organic materials, the comparison is between the current ratio of a radioactive isotope to a stable isotope of the same element and the known ratio of the two isotopes in living organisms.
Radiocarbon dating is one such type of radiometric dating.
A particular isotope of a particular element is called a nuclide. That is, at some point in time, an atom of such a nuclide will spontaneously change into a different nuclide by radioactive decay.
The decay may happen by emission of particles (usually electrons (beta decay), positrons or alpha particles) or by spontaneous nuclear fission, and electron capture.
For inorganic matter and for older materials, isotopes of other elements, such as potassium, uranium, and strontium, are used.
Elements exist in different isotopes, with each isotope of an element differing in the number of neutrons in the nucleus.Contamination from outside, or the loss of isotopes at any time from the rock's original formation, would change the result.