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How old is a rock that has 325 atoms of U-235 and 975 atoms of Pb-207? Total: | Half Lives: Age:​
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How old is a rock that has 325 atoms of U-235 and 975 atoms of Pb-207? Total: | Half Lives: Age:​

User StilgarBF
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Do U have a passage or something

User TwoThumbSticks
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