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If you are examining rock layers that are suspected to be about 20 million years old, which radioactive isotope would you use? Explain your answer

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john796

Answer:

Scientists usually use the potassium-argon method to date rocks that are older than about 1 million years. Uranium-238 is also used for radiometric dating.

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The radioactive isotope most applicable to date rocks of about 20 million years is Uranium

The use of radioactive isotope is used in the radiometric process of dating materials. Dating techniques are used in other to determine the age of rocks and minerals.

  • In other to ensure the effectiveness of the radiometric process, it is essential that the half life of the isotope be determined in other to measure the age of the rock.
  • For instance, carbon - 14 isotope has an half life of 5,730 years. Hence, carbon - 14 dating will only be used in dating rocks below 50,000 years.

In other to examine Rock layers of about 20 million years, the radioactive isotope to be used will be Uranium which could be used to date rocks of about hundred _ thousand million of years.

Learn more on radioactivity : https://brainly.com/question/8702908

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