$^{10_{5}$B + $^{4}_{2}$He $\rightarrow$ X + $^{1}_{0}$n. In the above nuclear reaction, X will be}
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Nuclear reaction rule:
\begin{itemize}
\item Conserve mass number (A)
\item Conserve atomic number (Z)
\item Identify element using periodic table
\end{itemize}