Radioactive isotope dating calculator goth scene dating community
However, the methods must be used with care -- and one should be cautious about investing much confidence in the resulting age...
especially in absence of cross-checks by different methods, or if presented without sufficient information to judge the context in which it was obtained.
In the case of radiocarbon dating, the half-life of carbon 14 is 5,730 years.
For example, an atom with 6 protons must be carbon, and an atom with 92 protons must be uranium.
Carbon is naturally in all living organisms and is replenished in the tissues by eating other organisms or by breathing air that contains carbon.
At any particular time all living organisms have approximately the same ratio of carbon 12 to carbon 14 in their tissues.
Half life can be defined as the time taken for the number of nuclei in a radioactive material to halve.
It can also be defined as the time taken for the count rate of a sample of radioactive material to fall to half of its starting level.
When an organism dies it ceases to replenish carbon in its tissues and the decay of carbon 14 to nitrogen 14 changes the ratio of carbon 12 to carbon 14.