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    Numerical dating

    Absolute dating, on the other hand is capable of telling the exact age of an item using carbon dating and many other techniques that were not there in earlier times.

    Relative dating makes use of the common sense principle that in a deposition of layers.

    Radiometric dating or radioactive dating is a technique used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they were formed.

    The method compares the abundance of a naturally occurring radioactive isotope within the material to the abundance of its decay products, which form at a known constant rate of decay.

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    Different methods of radiometric dating vary in the timescale over which they are accurate and the materials to which they can be applied.

    All ordinary matter is made up of combinations of chemical elements, each with its own atomic number, indicating the number of protons in the atomic nucleus.

    Additionally, elements may exist in different isotopes, with each isotope of an element differing in the number of neutrons in the nucleus.

    The age is based on the half-life of the isotopes (their rate of decay over time).

    When the age is determined in this manner, it is called the absolute age, from absolute dating techniques.

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