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The radioactive carbon has six protons and eight neutrons in its nucleus, giving it a total atomic mass of 14.

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Radioactive carbon (Carbon 14) is formed in the upper atmosphere as a byproduct of cosmic radiation.

Cosmic rays are positively charged atoms moving at enormous speeds.

When they strike ordinary atoms in the upper atmosphere, the cosmic rays smash them apart. Some of these neutrons then collide with nitrogen atoms.

This collision is less destructive than the initial collision that produced them.

Living organisms are constantly incorporating this C-14 into their bodies along with other carbon isotopes.

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.This 'law of superimposition' works in the well-defined layers of the Willandra lunettes, but only dates objects as younger or older than adjacent layers.To determine the year age (absolute age) of an object, a number of chemical and radioactive techniques can be used.Working out how old archaeological remains are is a vital part of archaeology.Scientific dating has confirmed the long residence of Aboriginal people in Australia.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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