\textbf{208-} Regarding the molecules $\text{H}_2\text{S}$, $\text{PCl}_3$, and $\text{SiCl}_4$, from right to left:
\begin{enumerate}
\item[(1)] Their central atoms have 2, 1, and 1 nonbonding electron pairs respectively.
\item[(2)] Their central atoms have 2, 3, and 4 electronic shells respectively.
\item[(3)] They have a bent shape, trigonal pyramidal, and tetrahedral respectively.
\item[(4)] Polar, nonpolar, and polar respectively.
\end{enumerate}