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How is radiocarbon dating done

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The older the material, the less C-14 it will contain, as the C-14 will have decayed over time at a fairly regular rate. C-12 to C-14 ratios are somewhat variable in normal samples.Plants take up Carbon as both isotopes, and incorporate that Carbon into their cells.The boat of a pharaoh was discovered in a sealed crypt and reassembled in a museum near the pyramids (see Fig. The age of our galaxy and earth also can be estimated using radioactive dating.Using the decays of uranium and thorium, our galaxy has been found to be between 10 and 20 billion years old and the earth has been found to be 4.6 billion years old. Within experimental error, this estimate agrees with the 15 billion year estimate of the age of the Universe.The following article is primarily based on a discussion of radiocarbon dating found in The Biblical Chronologist Volume 5, Number 1. Radiocarbon dating is based on a few relatively simple principles. The vast majority of these are C (pronounced "c twelve"), the stable isotope of carbon.

Plants obtain all their carbon atoms from the atmosphere.

The ratio of radiocarbon to stable carbon atoms in the atmosphere has varied in the past.

This is because the amount and strength of cosmic radiation entering the earth's atmosphere has varied over time.

An isotope is an element with the same “atomic number” (number of protons) , but a different “atomic weight” ( protons neutrons electrons.) Some isotopes are stable, which means they don't change over time ( well…

Regular Carbon, C-12 is the most common isotope of Carbon.