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5,730 years

Q: Carbon-14 has a half-life of 5730 years. How long does it take a 200-gram sample of carbon-14 to decay to a mass of 100 grams?

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5,730 years

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We see that carbon-14 undergoes beta minus decay to become nitrogen-14. Here's the equation: 614C => 714N + e- + ve The carbon-14 nucleus has a neutron within it change into a proton Then we see both a beta minus particle (an electron with high kinetic energy) and an antineutrino ejected from the nucleus.

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Geologists use carbon-14, an isotope of carbon, and nitrogen-14 in radiocarbon dating. Carbon-14 is absorbed by all living organisms during their lifetime, and by measuring the ratio of carbon-14 to nitrogen-14 in a sample, geologists can determine its age.

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