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A rock contains 0.153 mg of lead-206 for each milligram of u…
A rock contains 0.153 mg of lead-206 for each milligram of uranium-238. The half-life for the decay of uranium-238 to lead-206 is 4.5 × 109 yr. The rock was formed ________ years ago. (Assume there was no lead-206 in the beginning.) (8 points)
A rock contains 0.153 mg of lead-206 for each milligram of u…
Questions
A rоck cоntаins 0.153 mg оf leаd-206 for eаch milligram of uranium-238. The half-life for the decay of uranium-238 to lead-206 is 4.5 × 109 yr. The rock was formed ________ years ago. (Assume there was no lead-206 in the beginning.) (8 points)
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