6 rules relative age dating


05-Oct-2020 12:11

Where the amounts of parent and daughter isotopes can be accurately measured, the ratio can be used to determine how old the rock is, as shown in the following activities.Part 2a Activity — At any moment there is a small chance that each of the nuclei of U-235 will suddenly decay.If the nucleus has not yet decayed, there is always that same, slight chance that it will change in the near future.Atomic nuclei are held together by an attraction between the large nuclear particles (protons and neutrons) that is known as the "strong nuclear force", which must exceed the electrostatic repulsion between the protons within the nucleus.

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Some elements have forms (called isotopes) with unstable atomic nuclei that have a tendency to change, or decay.For example, U-235 is an unstable isotope of uranium that has 92 protons and 143 neutrons in the nucl eus of each atom.