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Therefore, the amount of radioactive carbon in the system will only decrease and form Nitrogen.

Through experimentation it has been determined that Carbon-14 has a half-life of about 5,370 years.

For instance, ancient tools are often pieces of stone that have been fashioned into different shapes; determining the age of specific tools has strong implications in the field of archaeology.

In some cases, an organic sample is indeed being analyzed, but for some reason it has been contaminated by radioactive carbon or is undatable by radiocarbon methods for some other reason.

By far, the most well-known type of radiometric dating is method using the radioactive isotope of carbon, carbon-14.

Every living organism on the planet contains the element carbon.

This means that if the amounts of C-14 and N-14 in a sample are known, then its age can be calculated for a wide range of years.

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With these changes in materials, different types of dating apply to different situations.The half-life of potassium-40 has been measured to be about 1.3 billion years.This method makes it possible to determine the relative age of samples, it is also useful in approximating the ages of items in a small area by establishing the date of a portion of the rock in that area.[2] Uranium-Lead (U/Pb) dating is one of the oldest methods of radiometric dating, Rutherford being one of the first scientists to note it.Like K/Ar dating, U/Pb dating is more suited to determining the age of matter that was not ever alive.

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