half life Flashcards

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1
Q

what is half life

A

The half-life of a radioactive isotope is the time it takes for the number of nuclei of the isotope in a sample to halve.

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2
Q

what is another definition of half life

A

The half-life is also the time it takes for the count rate (or activity) from a sample containing the isotope to fall to half its initial level.

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