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Radiometric dating is a means of determining the "age" of a mineral If a half life is equal to one year, then one half of the radioactive element will have. How do we determine the age of a rock? Principles of Radiometric Dating A half-life is the time it takes for half of the parent radioactive element to decay to a.
Radiometric age dating is based on the fact that certain elements spontaneously decay into others. (electron capture) → 40Ar18, halflife billion years. If there were such a pair of isotopes, radiometric dating would be very simple. If the half-life is very long, how can we know how long it is? The true age of a sample is self-explanatory, but unless the material dates from. Radiometric age dating half life.