\[
\boxed{
\begin{array}{|c|c|c|c|c|}
\hline \multicolumn{5}{|c|}{\text{Properties of subatomic particles}} \\
\hline \text{name} & \text{symbol} & \begin{tabular}{c}
\text{charge} \\
(\text{in multiples of } e)
\end{tabular} & \begin{tabular}{c}
\text{approximate} \\
\text{mass} \\
(\text{amu})
\end{tabular} & \begin{tabular}{c}
\text{location} \\
\text{on diagram}
\end{tabular} \\
\hline \text{neutron} & n & 0 & 1.0 & A \\
\hline \text{proton} & p^+ & +1 & 1.0 & \text{nucleus} \\
\hline \text{electron} & e^- & -1 & 0.0005 & \text{outside nucleus} \\
\hline
\end{array}
}
\]