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10-Jun-2020 20:48

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is converted into another specific atom or isotope at a constant and known rate.

The age calculated is only as good as the existing knowledge of the decay rate and is valid only if this rate is constant over the time that elapsed.In short, the process of radioactive decay is immutable under all known conditions.Although it is impossible to predict when a particular atom will change, given a sufficient number of atoms, the rate of their decay is found to be constant.In other words, it is the obligation of geochronologists to try to prove themselves wrong by including a series of cross-checks in their measurements before they publish a result.

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Such checks include dating a series of ancient units with closely spaced but known relative ages and replicate analysis of different parts of the same rock body with samples collected at widely spaced localities.In the first place, since the unknown term in radiometric dating is obviously ) rather than through the decay constant λ.



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