\[
\begin{array}{|c|cc|}
\hline
\text{compound} & \text{type of compound} \\
\hline
\mathrm{PbCrO}_{4} & \boxed{\text{ionic}} \\
\hline
\mathrm{H}_{2} \mathrm{~S} & \boxed{\text{molecular}} \\
\hline
\mathrm{Cl}_{2} \mathrm{O}_{3} & \boxed{\text{molecular}} \\
\hline
\end{array}
\]