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    Radiation dating

    If we knew the fraction of a radioactive element still remaining in a mineral, it would be a simple matter to calculate its age by the formula To determine the fraction still remaining, we must know both the amount now present and also the amount present when the mineral was formed.

    Contrary to creationist claims, it is possible to make that determination, as the following will explain: By way of background, all atoms of a given element have the same number of protons in the nucleus; however, the number of neutrons in the nucleus can vary.

    Professor Willard Libby produced the first radiocarbon dates in 1949 and was later awarded the Nobel Prize for his efforts.

    Radiocarbon dating works by comparing the three different isotopes of carbon.

    They used pottery and other materials in sites to date 'relatively'.

    They thought that sites which had the same kinds of pots and tools would be the same age.

    It has the same number of protons, otherwise it wouldn't be uranium.

    Kieth and Anderson show considerable evidence that the mussels acquired much of their carbon from the limestone of the waters they lived in and from some very old humus as well.

    The total mass of the isotope is indicated by the numerical superscript.

    While the lighter isotopes C has decayed that what remains can no longer be measured. In 5,730 years half of the C in the atmosphere, and therefore in plants and animals, has not always been constant.

    Rasmus Nyerup's quote reminds us of the tremendous scientific advances which have taken place in the 20th century.

    In Nyerup's time, archaeologists could date the past only by using recorded histories, which in Europe were based mainly on the Egyptian calendar.

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