agentjean2695 agentjean2695

12-10-2022
Chemistry

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naturally occurring uranium is composed mostly of and with relative abundances of 99.28 and respectively. the half-life for is years, and the half-life for 235 is years. assuming that the earth was formed 4.5 billion years ago, calculate the relative abundances of the 28 and isotopes when the earth was formed.

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