Asked by Amena

A sample starts with 1000 radioactive atoms. How many half-lives have elapsed when 875 atoms have decayed?

I am not sure how to solve this, please help!!

Answers

Answered by Steve
see Sidiqi's post below
Answered by Amena
I got 0.193 half-lives. Does this answer make sense??
Answered by Steve
makes sense to me. After 1 half-life there will only be 500 atoms, so it will be less than that.
Your answer is correct.
Answered by Anonymous
there will be three half lives when sample is decreased from 1000g to 875g.....
Answered by Eat Caca
caca man
Answered by Caleb Brown
yall are down tremendously
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