204- If in atom $\text{X}$, 12 electrons have orbital quantum number 1 and 10 electrons have orbital quantum number 2, and the sum of the spin quantum numbers of the electrons equals $+\dfrac{1}{2}$, how many of the following statements about it are correct?
This element is in group 12 of the periodic table.
Its atomic mass equals 28 and with element $_{47}\text{D}$ is in the same group.
Four electron shells of it are occupied by electrons.
It is a transition element and is in the same period as element $_{20}\text{A}$ in the periodic table.
The number of electrons of ion $\text{X}^{2+}$ equals the number of electrons of atom $_{47}\text{D}$.
(1) 2 (2) 3 (3) 4 (4) 5
\textbf{204-} If in atom $\text{X}$, 12 electrons have orbital quantum number 1 and 10 electrons have orbital quantum number 2, and the sum of the spin quantum numbers of the electrons equals $+\dfrac{1}{2}$, how many of the following statements about it are correct?
\begin{itemize}
\item This element is in group 12 of the periodic table.
\item Its atomic mass equals 28 and with element $_{47}\text{D}$ is in the same group.
\item Four electron shells of it are occupied by electrons.
\item It is a transition element and is in the same period as element $_{20}\text{A}$ in the periodic table.
\item The number of electrons of ion $\text{X}^{2+}$ equals the number of electrons of atom $_{47}\text{D}$.
\end{itemize}
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(1) 2 \hspace{1cm} (2) 3 \hspace{1cm} (3) 4 \hspace{1cm} (4) 5
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