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Hereafter these isotopes will be referred to as 12C, 13C, and 14C.14C is radioactive and has a half-life of 5730 years.When a plant or animal dies it no longer exchanges CO with the atmosphere (ceases to take 14C into its being). 14C decays by emitting an electron, which converts a neutron to a proton, converting it back to its original 14N form.The History of Radiocarbon Dating Willard Libby invented radiocarbon dating in the late 1940s.MCI does not make any warranty, expressed or implied; does not assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information or process disclosed; nor represents that its use would not infringe privately owned rights.If any organizations or other pertinent information has been inadvertently excluded please contact MCI.
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Three isotopes of carbon are found in nature; carbon-12, carbon-13 and carbon-14.
Carbon-12 accounts for ~99.8 % of all carbon atoms, carbon-13 accounts for ~1% of carbon atoms while ~1 in every 1 billion carbon atoms is carbon-14.
Radiocarbon dating: radioactive carbon decays to nitrogen with a half-life of 5730 years.
In dead material, the decayed 14C is not replaced and its concentration in the object decreases slowly.