Question
Based on your graph above, approximately how much of the parent isotope would be remaining after $3.5$ half-lives?a. $16 \%$b. $12 \%$c. $4 \%$d. $8 \%$
Step 1
After 2 half-lives, 50% of the remaining 50% is left, which is 25%. After 3 half-lives, 50% of the remaining 25% is left, which is 12.5%. Now, we need to find the amount remaining after 3.5 half-lives. Halfway between 3 and 4 half-lives, the amount remaining would Show more…
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