Em tham khảo nha :
\(\begin{array}{l}
Che\,A:1{s^2}2{s^2}2{p^4}\\
Che\,\,B:1{s^2}2{s^2}2{p^6}3{s^2}3{p^3}\\
Che\,C:1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}\\
Che\,D:1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^1}4{s^2}\\
Che\,E:1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^5}4{s^2}\\
Che\,F:1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^{10}}4{s^2}\\
Che\,G:1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^{10}}4{s^2}4{p^5}
\end{array}\)