## Half-life - Radioactive emissions - OCR Gateway - GCSE.

The half-life of a radioactive isotope describes the amount of equation that it takes half of the isotope in a sample to decay. In the case of radiocarbon dating, the half-life of carbon 14 is 5, years. This half life is a relatively small number, which means life carbon 14 equation is not particularly helpful for very recent deaths equation.

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