Carbon dating half life problem

The half-lives of many radioactive isotopes have been determined and they have been found to range from extremely long half-lives of 10 billion years to extremely short half-lives of fractions of a second. Potassium-argon dating uses a similar method. So if you go back after a half-life, half of the atoms will now be nitrogen. C ratio in the remains decreases. Or you could define it that way. Chemists and geologists use tritium dating to determine the age of water ocean and fresh.

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But the way we think about half-life is, people have studied carbon and they said, look, if I start off with 10 grams-- if I have just a block of carbon that's 10 grams.

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Half-life and carbon dating

Radiation that comes from environment sources including the earth's crust, the atmosphere, cosmic rays, and radioisotopes. So we started with this. Although chemical changes were sped up or slowed down by changing factors such as temperature, concentration, etc, these factors have no effect on half-life. So this is about, what? But the way we think about half-life is, people have studied carbon and they said, look, if I start off with 10 grams-- if I have just a block of carbon that's 10 grams.

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