203- All of the following statements are correct, except:
The sub-shell $p$ in the last shell of all metalloid elements is empty.
Some metalloid elements, like some main-group elements, have one type of valence electron.
In fifth-period transition elements, only in $_{48}\text{Cd}$, the total quantum spin number of electrons equals zero.
In metals of each period, as the atomic number increases, the number of electrons in the valence shell of the atom and also the metallic character increase.
\textbf{203-} All of the following statements are correct, \textbf{except}:
\begin{enumerate}
\item The sub-shell $p$ in the last shell of all metalloid elements is empty.
\item Some metalloid elements, like some main-group elements, have one type of valence electron.
\item In fifth-period transition elements, only in $_{48}\text{Cd}$, the total quantum spin number of electrons equals zero.
\item In metals of each period, as the atomic number increases, the number of electrons in the valence shell of the atom and also the metallic character increase.
\end{enumerate}
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