Asked by Matthew

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

12 years ago

Answered by DrBob222

same procedure

12 years ago

Answered by Kevin

213,000 years

12 years ago

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