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The mass spectrometer is able to give information about the type and amount of isotopes found in the rock.Scientists find the ratio of parent isotope to daughter isotope.

common isotopes used in radiometric dating-3common isotopes used in radiometric dating-83

Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages.

We could be sure that a mineral containing parentium originally had no daughterium.

If the mineral contained 1 part per million Parentium-123 and 3 parts per million Daughterium-123, we could be sure all the Daughterium-123 was originally Parentium-123.

Scientists can use certain types of fossils referred to as index fossils to assist in relative dating via correlation.

Index fossils are fossils that are known to only occur within a very specific age range.

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