Asked by OhSnap

If a 100.0 gram sample of a radioactive isotope goes through three half-lives, how much of the original radioactive isotope will remain?
Answered by DrBob222
2^3 = 8
So 1/8 of the sample will remain.
1/8 x 100 = 12.5g remaining.
Answered by Mr. Hojman
Do not cheat and use this website! Rats