Chemistry, 11.09.2021 07:50, lifewkeya

Which of the following could be an isotope of element X-12? 12^x, 12^y, 14^y, 14^x, $_{19}x$ , $_{12}x$

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Which of the following could be an isotope of element X-12? 12^x, 12^y, 14^y, 14^x, ,...