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Natural diamonds are believed to have been formed deep underground in the upper mantle of the earthâ€™s crust. Under extreme temperature and pressure, pure carbon is
Question How is carbon dating done? Asked by: William Baker Answer Carbon 14 (C14) is an isotope of carbon with 8 neutrons instead of the more common 6 neutrons.
Experts can compare the ratio of carbon 12 to carbon 14 in dead material to the ratio when the organism was alive to estimate the date of its death.
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Radiocarbon dating can be used on samples of bone, cloth, wood and plant fibers.
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Where t 1/2 Â is the half-life of the isotope carbon 14, t is the age of the fossil (or the date of death) and ln() is the natural logarithm function.
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When an organism dies it ceases to replenish carbon in its tissues and the decay of carbon 14 to nitrogen 14 changes the ratio of carbon 12 to carbon 14.
So, the fossil is 8,680 years old, meaning the living organism died 8,680 years ago.
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Â in the case of radiocarbon dating, the half-life of carbon 14 is 5,730 years.
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Â the half-life of a radioactive isotope describes the amount of time that it takes half of the isotope in a sample to decay.
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At any particular time all living organisms have approximately the same ratio of carbon 12 to carbon 14 in their tissues.
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Â when finding the age of an organic organism we need to consider the half-life of carbon 14 as well as the rate of decay, which is â€“0.