206- Which of the following statements is correct?
[A)] The oxidation number $-2$ in ion $\text{Cr}_2\text{O}_7^{2-}$ belongs to the oxygen atoms.
[B)] In the chemical formula of scandium carbonate, the number of anions is $1.5$ times the number of cations.
[C)] The main reason for the neutrality of ionic solids is that the number of positive ions equals the number of negative ions.
[D)] In the crystal lattice of a solid, the amount of energy released when forming one mole of solid from its gaseous ions equals the lattice energy.
(1) A, B (2) A, C (3) B, C (4) B, D
\textbf{206-} Which of the following statements is correct?
\begin{itemize}
\item[A)] The oxidation number $-2$ in ion $\text{Cr}_2\text{O}_7^{2-}$ belongs to the oxygen atoms.
\item[B)] In the chemical formula of scandium carbonate, the number of anions is $1.5$ times the number of cations.
\item[C)] The main reason for the neutrality of ionic solids is that the number of positive ions equals the number of negative ions.
\item[D)] In the crystal lattice of a solid, the amount of energy released when forming one mole of solid from its gaseous ions equals the lattice energy.
\end{itemize}
\begin{center}
(1) A, B \hspace{1cm} (2) A, C \hspace{1cm} (3) B, C \hspace{1cm} (4) B, D
\end{center}