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March 30, 2017

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All isotopes of technetium are radioactive, but they have widely varying half-lives. If an 800.0 g sample of technetium-99 decays to 100.0 g of technetium-99 in 639,000 y, what is its half life

  • Chemistry - ,

    same procedure

  • Chemistry - ,

    213,000 years

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