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Posted by / 25-Mar-2015 16:35

When the isotope is halfway to that point it has reached its half-life.

There are different methods of radiometric dating that will vary due to the type of material that is being dated.

Radiometric dating is used to estimate the age of rocks and other objects based on the fixed decay rate of radioactive isotopes.Learn about half-life and how it is used in different dating methods, such as uranium-lead dating and radiocarbon dating, in this video lesson. As we age, our hair turns gray, our skin wrinkles and our gait slows.For example, uranium-lead dating can be used to find the age of a uranium-containing mineral.It works because we know the fixed radioactive decay rates of uranium-238, which decays to lead-206, and for uranium-235, which decays to lead-207.However, rocks and other objects in nature do not give off such obvious clues about how long they have been around.

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So we rely on radiometric dating to calculate their ages.