Suppose there are 1000 grams of an isotope that has a half-life of 10 minutes.How much of the isotope will be left after 40 minutes?
A)250 grams
B)0 grams
C)125 grams
D)62.5 grams

Name: Suppose there are 1000 grams of an isotope that has a half-life of 10 minutes.How much of the isotope will be left after 40 minutes? A)250 grams B)0 grams C)125 grams D)62.5 grams
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Question

Quizplus · Accepted Answer

After 40 minutes, or 4 half-lives (10 minutes each), the amount of isotope would halve 4 times: 1000g -> 500g -> 250g -> 125g -> 62.5g.

Suppose There Are 1000 Grams of an Isotope That Has