The rate of decay of carbon-14 is called

Carbon-12 and carbon-13 are both stable, while the half-life of carbon-14 is 5,730±40 years. Carbon-14 decays into nitrogen-14 through beta decay. A gram of carbon containing 1 atom of carbon-14 per 1012 atoms will emit ~0.2 beta particles per second.

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rocks and weathering-matching