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OpenStudy (anonymous):
Could someone please help! Im confused on this, i was so sure it was A Carbon 14 but i got it wrong. help please!!! Which of the following is a radioisotope used to date rock formations older than 50,000 years? A. carbon-14 B. uranium-235 C. cobalt-60 D. carbon-12
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OpenStudy (anonymous):
You use uranium, carbon 14 half life is such that after 50000 years there won't be much left in the sample.
OpenStudy (anonymous):
thank you,
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