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Suppose That Starting With 22789\begin{array} { r } 227 \\89\end{array} , the Following Sequence of Decays Occurs: First an Alpha

question 77

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Suppose that starting with 22789\begin{array} { r } 227 \\89\end{array} , the following sequence of decays occurs: first an alpha decay, then a beta-minus decay, and finally another alpha decay. What isotope is left after each one of the decays?


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