British Broadcasting Corporation Home. Carbon is a radioactive isotope of carbon it has two extra neutrons in its nucleus making it unstable. South Tyrol Museum of Archaeology. There's a small amount of radioactive carbon in all living organisms. When they die no new carbon is taken in by the dead organism. The carbon it contained at the time of death decays over a long period of time. By measuring the amount of carbon left in dead organic material the approximate time since it died can be worked out.
For example, intwo hikers discovered shadow hearts 2 dating outfit mummified man, preserved for centuries in the ice on an alpine mountain. Some rocks contain traces of uranium. Uranium has a very long half-life and so by measuring how much uranium is left carbon dating gcse bitesize a rock its approximate age can be worked out. Back to Radiation for life index.
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This page has been archived and is no longer updated. Find out more about page archiving. BBC Radio 1 BBC 1Xtra. Print Science Uses of radioisotopes. Radioactive dating Carbon dating Carbon is a radioactive isotope of carbon it has two extra neutrons in its nucleus making it unstable. Activity Revision Map Give your revision some visual style with a Bitesize revision map! Links BBC Science and Nature The natural world and beyond! On the web The Science Museum BrainPOP Science GCSE. Revision Guide Revision Centre Revision World.