\textbf{205-} Element $_{M}$A with element ......... are in the same group in the periodic table, and the last and outermost occupied subshell of that atom, ......... is and ......... comes out to be calculated.
\begin{enumerate}
\item[(1)] $_{44}$X, semi-metal, $4\text{p}^4$ \quad (2) $_{22}$Y, non-metal, $4\text{p}^2$ \quad (3) $_{44}$X, semi-metal, $5\text{p}^4$ \quad (4) $_{22}$Y, semi-metal, $5\text{p}^2$, non-metal
\end{enumerate}