Qxi.xli
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je suis un peu confuse parce que in my notes it says that carbon dating uses isotopic data, but how? i searched it up, and I just got that carbon dating uses the radioactive decay of materials to work out the age, so how is isotopic data used? thank you in advance
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Stonebridge
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(Original post by vix.xvi)
je suis un peu confuse parce que in my notes it says that carbon dating uses isotopic data, but how? i searched it up, and I just got that carbon dating uses the radioactive decay of materials to work out the age, so how is isotopic data used? thank you in advance
It uses the relative proportion of the 2 isotopes, Carbon 12 and Carbon 14.
Carbon 12 is stable and constitutes around 99% of all carbon on earth. Carbon 14 is unstable and decays with a half life of 5730 years.

It is by measuring the amount of C 14 remaining in once living organisms, that their age can be determined. Or more correctly, how long ago the organism died. While alive the ratio of C12 to C14 is thought to have remained constant. After death the C 14 decays but is not replaced.
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Qxi.xli
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(Original post by Stonebridge)
It uses the relative proportion of the 2 isotopes, Carbon 12 and Carbon 14.
Carbon 12 is stable and constitutes around 99% of all carbon on earth. Carbon 14 is unstable and decays with a half life of 5730 years.

It is by measuring the amount of C 14 remaining in once living organisms, that their age can be determined. Or more correctly, how long ago the organism died. While alive the ratio of C12 to C14 is thought to have remained constant. After death the C 14 decays but is not replaced.
merci beacoup!! x
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User135792468
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(Original post by vix.xvi)
je suis un peu confuse parce que in my notes it says that carbon dating uses isotopic data, but how? i searched it up, and I just got that carbon dating uses the radioactive decay of materials to work out the age, so how is isotopic data used? thank you in advance
Carbon-14 is a radioactive isotope of carbon. It is much less abundant than the standard carbon-12 but we digress.

Life on earth is carbon-based. So everything has a mixture of carbon-12 and carbon-14 within them. The half life of carbon-14 is known so scientists can just measure the radiation from the object of interest then works backwards using the half life to calculate the original age of something
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