S skyisblue Full Member 10+ Year Member 15+ Year Member Joined Dec 26, 2006 Messages 430 Reaction score 0 Apr 24, 2007 #1 Members don't see this ad. how are radioactive isotopes used as tracers?
S skyisblue Full Member 10+ Year Member 15+ Year Member Joined Dec 26, 2006 Messages 430 Reaction score 0 Apr 24, 2007 #2 I got it! Upvote 0 Downvote
