We know these steps because researchers followed the progress of carbon-14 throughout the process.Radioactive isotopes are useful for establishing the ages of various objects.

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Carbon dating has the peculiar property that it works primarily on dead things.

Other forms of radioactive dating are more broadly applicable. It decays to Nitrogen 14 and has a half life of 5,730 years.

Carbon-14 has a half life of 5730 years and its daughter isotope is Nitrogen-14. The isotope of carbon is used to date the ancient fossils.

Since every living creature had organic matter and carbon is an integral part of that organic matter, it is conventional to use carbon isotope.

After incorporating radioactive atoms into reactant molecules, scientists can track where the atoms go by following their radioactivity.

One excellent example of this is the use of carbon-14 to determine the steps involved in photosynthesis in plants.

Radioactive isotopes are used for radioactive dating.

For example, you would use radioactive isotope Carbon-14 to date anything under 70,000 years that was once living.

Typically, Carbon 14 is used for fossil dating for fossils 100-30,000 years old, but older than that, Potassium 40 or Rubidium 87 are more effective. Carbon dating is the radio-activity of Carbon 14 which is unstable so it emits protons once in a while in order to become a more stable isotope.