Radioactive dating fossils isotopes used

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This decay process leads to a more balanced nucleus and when the number of protons and neutrons balance, the atom becomes stable.

This radioactivity can be used for dating, since a radioactive 'parent' element decays into a stable 'daughter' element at a constant rate.

Radiocarbon dating is normally suitable for organic materials less than 50 000 years old because beyond that time the amount of 14C becomes too small to be accurately measured.

This scheme was developed in 1937 but became more useful when mass spectrometers were improved in the late 1950s and early 1960s.

This system is highly favoured for accurate dating of igneous and metamorphic rocks, through many different techniques.Radioactive decay is a natural process and comes from the atomic nucleus becoming unstable and releasing bits and pieces.These are released as radioactive particles (there are many types).However, there is a limited range in Sm-Nd isotopes in many igneous rocks, although metamorphic rocks that contain the mineral garnet are useful as this mineral has a large range in Sm-Nd isotopes.This technique also helps in determining the composition and evolution of the Earth's mantle and bodies in the universe.

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