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Potassium argon carbon dating

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In practice, each of these values may be expressed as a proportion of the total potassium present, as only relative, not absolute, quantities are required.
By comparing the proportion of K to Ar in a sample of volcanic rock, and knowing the decay rate of K, the date that the rock formed can be determined. For every K atoms that decay, 11 become Ar Views Read Edit View history. You may find it helpful to search within the site to see how similar or related subjects are covered.

K–Ar dating

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Use dmy dates from May Contact our editors with your feedback. The amount of 40 K is rarely measured directly.
Learn More in these related Britannica articles: How Does the Reaction Work? One out of every 10, Potassium atoms is radioactive Potassium K Atom, smallest unit into which matter can be divided without the release of electrically charged particles. By using this site, you agree to the Terms of Use and Privacy Policy.
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