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lodine-131, a radioactive isotope of iodine, has a half-life of 8 days. After 40 days, if 1.5 g of lodine-131 still remains, what is the original amount of iodine-131?
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lodine-131, a radioactive isotope of iodine, has a half-life of 8 days. After 40 days, if 1.5 g of lodine-131 still remains, what is the original amount of iodine-131?

User DJphy
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3.7k points

1 Answer

1 vote

Answer:

48g

Step-by-step explanation:

5 half-lives have passed. Therefore the amount was 32 times the current amount.

User David Bendory
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4.1k points
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