The number 14 in carbon 14 dating

This is still a large number of C14 atoms, and they had to come from somewhere!

Extraordinary efforts were made to eliminate all contamination from the measuring apparatus.Organic matter in the fossil record generally dates by carbon 14 (C14) dating to about 20,000 to 40,000 years. Many creationists believe that radioactive decay was faster in the past.Other radioactive dating methods such as potassium/argon (K/Ar), rubidium/strontium (Rb/Sr), uranium/lead (U/Pb), thorium/lead (Th/Pb) and others that are based on decay of longer-lived isotopes often give ages in the millions or hundreds of millions of years for these fossils. However, in this talk I want to concentrate on reasons to believe the C14 dates are more accurate and that they give evidence that all life on earth is very young.In 20,000 years the concentration of C14 decreases by a factor of 0.089 (to less than a tenth) because (1/2) or about 7 billion C14 atoms in a mole of C12.Thus a sample that dates to 40,000 years by C14 dating still has about 7 billion C14 atoms per mole of carbon.

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