If the amount of radioactive element is 1/8 of the amount originally present, how many half-lives have gone by? Please show your work
What will be an ideal response?
P=Parent, D = Daughter, HL = Half-lives
P D HL
1 0 0
1/2 1/2 1
1/4 3/4 2
1/8 7/8 3
The answer is 3 half-lives have gone by.
Environmental & Atmospheric Sciences
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