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    Explain carbon 14 radioactive dating How to startsex chat with a friend

    A very small percentage of carbon, however, consists of the isotope carbon 14, or radiocarbon, which is unstable.

    By measuring the amount of carbon-14 left in the organism, it's possible to work out how old it is.

    Isotopes of a particular element have the same number of protons in their nucleus, but different numbers of neutrons.

    This means that although they are very similar chemically, they have different masses.

    Rachel Wood does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond the academic appointment above.

    Australian National University provides funding as a member of The Conversation AU.

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