Question
Write the names of group 18 elements and their electronic configuration.

Answer

ElementsSymbolsAtomic numberElectronic configuration
Helium$He$2$1 s^2$
Neon$Ne$10$1 s^2 2 s^2 2 p^6$ Or $[ He ] 2 s^2 2 p^6$
Argon$Ar$18$1 s^2 2 s^2 2 p^6 3 s^2 3 p^6$ Or $[ Ne ] 3 s^2 3 p^6$
Krypton$Kr$36$\begin{aligned} & 1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 3 d^{10} \\ & 4 s^2 4 p^6 4 d^{10} 5 s^2 5 p^5\end{aligned}$
Xenon$Xe$54$\begin{gathered}1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 3 d^{10} 4 s^2 4 p^6 4 d^{10} 5 s^2 5 p^6 \\ \operatorname{Or}[ Kr ] 4 d^{10} 5 s^2 5 p^6\end{gathered}$
Radon$Rn$86$\begin{gathered}1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 3 d^{10} 4 s^2 4 p^6 4 d^{10} 4 f^{14} \\ 5 s^2 5 p^6 5 d^{10} 6 s^2 6 p^6 \\ \text { Or }[ Xe ] 4 f^{14} 5 d^{10} 6 s^2 6 p^6\end{gathered}$

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