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horsena [70]
3 years ago
9

HELP with this please.

Physics
2 answers:
jasenka [17]3 years ago
6 0
17. C. Isotopes
18. Tracers
19. Alpha Decay
jolli1 [7]3 years ago
4 0
17. C. 
18. Tracers
19. Alpha Decay

Hope this helps and please mark as brainliest!
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