Asked by nancy
if a 84g sample of thorium decays with a 10 minute half life, how much would the sample weight in a half hour?
Answers
Answered by
Damon
half hour = 30 min = 3 half lives
84 * 1/2 * 1/2 * 1/2 = 84/8 = 10.5g
or in general
mass = original mass /2^n
where n is the number of half lives
84 * 1/2 * 1/2 * 1/2 = 84/8 = 10.5g
or in general
mass = original mass /2^n
where n is the number of half lives
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