Carbon 14 dating be

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Carbon has an atomic number of 6, an atomic weight of 12.011, and has three isotopes: carbon-12, carbon-13, and carbon-14.

(The numbers 12, 13 and 14 refer to the total number of protons plus neutrons in the atom's nucleus.

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Radiocarbon dating is therefore limited to objects that are younger than 50,000 to 60,000 years or so.Additionally, we know that plants typically grow at different times in different parts of the northern hemisphere.To test this oversight, the researchers measured a series of carbon 14 ages in southern Jordan tree rings calculated as being from between 16.This dramatically improves accuracy, and reduces the amount of carbon required from about 10 grams to only a few milligrams.In recent years, dating methods based on cosmogenic isotopes other than carbon (such as beryllium-10 and chlorine-36) have been developed, which allow for the dating of a wider variety of objects over much longer time scales.

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