Mathematics
Hondagirl1
23

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 220 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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joycesouza

220 grams After 5 half-lives you have (1 / (2^5) ) of the original remaining. 2^5 = 32 So, 1/32 = 0.03125 220 * .03125 = 6.875 grams remaining after 5 half-lives.

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