Radioactive dating gcse dating in savannah

01-Nov-2017 20:22

This time varies from few-millionths of a second to millions of years for different radioactive isotopes.

In a large collection of atoms, there is a definite time, called the half-life of the isotope, after which one-half of the total number of nuclei would have decayed.Carbon-14 is a radioactive isotope of carbon with a half-life of 5730 years.All living matter takes in carbon-14 during its lifetime as it naturally occurs in nature.Of the nuclei found on Earth, the vast majority are stable.

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This is so because almost all short-lived radioactive nuclei have decayed during the history of the Earth.A much more useful quantity for dealing with the life of radioactive substances is the half-life.

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