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25-Oct-2017 09:08

These variations are called isotopes of that element.While the number of neutrons varies, every atom of any element always has the same number of protons and electrons.The atoms of some chemical elements have different forms, called isotopes.These break down over time in a process scientists call radioactive decay.

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Geologists use radiocarbon to date such materials as wood and pollen trapped in sediment, which indicates the date of the sediment itself.All radiometric dating methods measure isotopes in some way.