South Tyrol Museum of Archaeology. There's a small amount of radioactive carbon osotopes all isotoppes 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 tadioactive. 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 a mummified man, preserved for centuries in the ice on an alpine mountain.
Some rocks contain traces of uranium. Uranium has a radioactiev long half-life and so by measuring how much uranium is left radiowctive a rock its approximate age can be worked out. Back to Radiation for life index. You're using the Radioactivd Explorer 6 browser to view the BBC website. Our site will work much better if you change to a more modern browser.
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Find out more about page archiving. BBC Radio 1 BBC 1Xtra. Print Science Uses of isoyopes. 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.