uranium isotope has have life of 4.5 billion years approximatly how much ofthis isotop is lft on earth today compared to the begining?



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    To answer this question with a precise number, I’d probably need a little more information than you’re giving. Since the earth is estimated to be 4.5-4.6 billion years old, there would probably be about half as much of this isotope of uranium on the earth now as there was at the beginning. However, since I don’t know what isotope you’re talking about, I can’t give you any numbers.

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