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Fossils and Fossilization - Class X
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Which of the following isotopes is used for finding the fossil age maximum about $35,0000$ years?
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A
$^{238}U$
💡 Explanation:
Half life of carbon-14 is approx. 5730 years, hence it can be used to determine the age of fossil upto 70,000 years.
Half life of U-238 is 4.5 billion years .
So, the correct option is '238U'