Tetchnetium is a radioactive isotope that emits a gamma ray


Tetchnetium is a radioactive isotope that emits a gamma ray with a half life of 6 hours.

A) if a dose of technicium-99 is prepared at 6 hous before it is used, what fraction of the original amount of the isotope remains at the time of use?

B) what fraction of the original dose remains in the body 24 hours after preparation?

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Physics: Tetchnetium is a radioactive isotope that emits a gamma ray
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