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When the organisms die, they stop incorporating new C-14, and the old C-14 starts to decay back into N-14 by emitting beta particles.

The older an organism's remains are, the less beta radiation it emits because its C-14 is steadily dwindling at a predictable rate.

Upon death, no more C means that it does not work for organisms that died after about 40,000 years ago. Palaeoglaciology of the Alexander Island ice cap, western Antarctic Peninsula, reconstructed from marine geophysical and core data.

In the figure right, the production of radio-active carbon is demonstrated.

If you have a fossil, you can tell how old it is by the carbon 14 dating method.

This is a formula which helps you to date a fossil by its carbon.

maximum age carbon 14 dating can used-10

Until this century, relative dating was the only technique for identifying the age of a truly ancient object.

Carbon has two stable, nonradioactive isotopes: carbon-12 (12C), and carbon-13 (13C).

In addition, there are tiny amounts of the unstable isotope carbon-14 (14C) on Earth.

Here, 7 protons and 7 neutrons (N) plus one neutron form an isotope of carbon, with 8 neutrons and 6 protons[1].

Radiocarbon dating can easily establish that humans have been on the earth for over twenty thousand years, at least twice as long as creationists are willing to allow.

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