Carbon 14 dating information
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Australia has two machines dedicated to radiocarbon analysis, and they are out of reach for much of the developing world.In the 19th and early 20th century incredibly patient and careful archaeologists would link pottery and stone tools in different geographical areas by similarities in shape and patterning.Then, by using the idea that the styles of objects evolve, becoming increasing elaborate over time, they could place them in order relative to each other - a technique called seriation.Isotopes of a particular element have the same number of protons in their nucleus, but different numbers of neutrons.
This means that although they are very similar chemically, they have different masses.
In addition, samples need to be thoroughly cleaned to remove carbon contamination from glues and soil before dating.
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