iran-konkur 2017 Q204

iran-konkur · Other · konkur-riazi_1396_specialized Not Maths
204- An element whose last electronic subshell configuration is $4s^2\,4p^3\,4s^2$ is in which group and which period of the periodic table?
(1) 13, fourth (2) 13, fifth (3) 15, fourth (4) 15, third
\textbf{204-} An element whose last electronic subshell configuration is $4s^2\,4p^3\,4s^2$ is in which group and which period of the periodic table?

\begin{center}
(1) 13, fourth \qquad (2) 13, fifth \qquad (3) 15, fourth \qquad (4) 15, third
\end{center}