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By looking at the half-life of a radionuclide (as well as its chemistry), we can select which one will be best for determining the age of rock. The longer the half-life, the "farther back" in time we can measure to discover some things about when it originated.

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Q: What determines which radioactive element will give more accurate measurement of a rock's age?
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Related questions

What characterizes a radioactive element?

As radioactive element is an element that is on the Priodic Table of Elements. A Radioactive Element is usually radioactive.


Is the element sodium radioactive or non-radioactive?

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It's a semantic thing - by definition, if something gives out radiation, then it is radioactive. If an element gives off radiation, then it is a 'radioactive' element. If it does not give out radiation, then it is not 'radioactive'.


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Is francium a radioactive element?

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