Transcript text: \begin{tabular}{|c|c|}
\hline \multicolumn{2}{|c|}{ Some polyatomic ions } \\
\hline name & chemical formula \\
\hline Ï] & $\mathrm{CO}_{3}^{2-}$ \\
\hline acetate anion & $\square$ \\
\hline$\square$ & $\mathrm{NH}_{4}^{+}$ \\
\hline$\square$ & $\mathrm{ClO}_{3}^{-}$ \\
\hline
\end{tabular}