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β 6y ago0.25
Anonymous
1mg
1 mg
1 mg
2.5
1/8th of a mg. You lose half every three hours.
After 132 hours, 1/4 of the initial sample of 10 Ci of Mo-99 would remain. Since the half-life is 66 hours, after 66 hours half of the sample would remain (5 Ci), and after another 66 hours (totaling 132 hours), half of that remaining amount would be left.
1 mg
1mg
If the substance has a half-life of 10 years, there would be 10 half-lives in a 100-year span. Each half-life reduces the amount by half, so after 100 years, 1/2^10 = 1/1024 grams of the sample would remain.
1 mg
0.5 mg
.25 mg
1 mg
0.25 mg
1 mg
2.5
1/8th of a mg. You lose half every three hours.