iran-konkur 2022 Q195

iran-konkur · Other · konkur-riazi_1401_specialized Not Maths
195-- How many of the following statements are correct?
  • Element ${}_{28}Z$ is a transition metal from group 15 and period 4 of the periodic table.
  • In atoms of elements, subshells with $l+1$ are smaller and hold fewer electrons.
  • If two nonmetals form a compound with general formula $\text{AD}_4$, element A is in group 14 of the periodic table.
  • In the new atomic model, electrons in space are very small compared to the nucleus, and in the layers around it, they are considered to be taken.

(1) four (2) three (3) two (4) one
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\textbf{195-- How many of the following statements are correct?}

\begin{itemize}
\item Element ${}_{28}Z$ is a transition metal from group 15 and period 4 of the periodic table.
\item In atoms of elements, subshells with $l+1$ are smaller and hold fewer electrons.
\item If two nonmetals form a compound with general formula $\text{AD}_4$, element A is in group 14 of the periodic table.
\item In the new atomic model, electrons in space are very small compared to the nucleus, and in the layers around it, they are considered to be taken.
\end{itemize}

\hspace{1cm} (1) four \hspace{2cm} (2) three \hspace{2cm} (3) two \hspace{2cm} (4) one



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\textbf{Chemistry} \hfill $\leftarrow$ 122-A $\rightarrow$ \hfill \textbf{Page 11}