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bio_man bio_man
wrote...
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Posts: 33390
10 years ago
Which of the following is not a very long-lived, radioactive isotope?
A) U-238
B) K-40
C) Rb-87
D) C-14
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wrote...
Valued Member
10 years ago
I believe the answer is D) C-14.
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(21:17:22) (527183): -1" OR 2+820-820-1​=0+0+0+1 --
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