A sample contains 10 g of a radioactive isotope. How much radioactive isotope will remain in the sample after 2 half-lives?
2 answers:
The answer c - Half life how to figure, you first divide it by half then divide than number by half
Answer:
c) 2.5 g
Explanation:
half-life is the time it takes the radioactive isotope to decay to half of the intial sample.
so if the isotope decays to 2 half-lives, it will decay half the intial sample twice.
in the first half-life, the sample will decay from 10 g to 5 g. during the second half-life, the isotope will decay from 5 g to 2.5 g.
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