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Title: Which of the following isotopes is radioactive? Post by: dada83 on Sep 10, 2017 Which of the following isotopes is radioactive?
A) 18O B) 13C C) 14C D) 1H Title: Re: Which of the following isotopes is radioactive? Post by: zudomusti on Sep 10, 2017 Content hidden
Title: Re: Which of the following isotopes is radioactive? Post by: dada83 on Dec 31, 2017 Excellenteee
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