199- Which of the following statements about the band structure of amorphous solids is correct?
[(1)] After the last full band, a half-full band (partially filled) exists.
[(2)] The number of electrons present in the conduction band is very large.
[(3)] The energy gap between the last full band and the first empty band is large and about 5 electron volts.
[(4)] The energy gap between the last full band and the first empty band is small and about 1 electron volt.
\textbf{199-} Which of the following statements about the band structure of amorphous solids is correct?
\begin{enumerate}
\item[(1)] After the last full band, a half-full band (partially filled) exists.
\item[(2)] The number of electrons present in the conduction band is very large.
\item[(3)] The energy gap between the last full band and the first empty band is large and about 5 electron volts.
\item[(4)] The energy gap between the last full band and the first empty band is small and about 1 electron volt.
\end{enumerate}