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OpenStudy (anonymous):
The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with 120 grams of a radioactive isotope, how much will be left after 5 half-lives? Use the calculator provided and round your answer to the nearest gram.
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OpenStudy (rational):
After one half-life, 120/2 = 60 grams will be left
OpenStudy (rational):
After two half-lives, 60/2 = 30 grams will be left
OpenStudy (rational):
can you keep going ?
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