Physics, 15.05.2021 22:20 kaidencearley

If a 500.0 g sample of technetium-99 decays to 62.5 g of technetium-99 remaining in 639,000 years, what is the half-life of technetium-99?

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If a 500.0 g sample of technetium-99 decays to 62.5 g of technetium-99 remaining in 639,000 years, w...