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A small asteroid crashes to Earth. After chemical analysis, it is found to contain 1 g...

A small asteroid crashes to Earth. After chemical analysis, it is found to contain 1 g of technetium-99 to every 3 g of ruthenium-99, its stable daughter isotope. If the half-life of technetium-99 is 211 000 years, how old is the asteroid, approximately?

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