Giúp mình bài này ạ

\begin{array}{|c|c|c|}
\hline H&1&1s^2&1&1&1\\
\hline Li&3&1s^22s^1&2&1&1\\
\hline Na&11&1s^22s^22p^63s^1&3&1&1\\
\hline K&19&1s^22s^22p^63s^23p^64s^1&4&1&1\\
\hline Ca&20&1s^22s^22p^63s^23p^64s^2&4&2&2\\
\hline Mg&12&1s^22s^22p^63s^2&3&2&2\\
\hline C&6&1s^22s^22p^2&2&4&2\\
\hline Si&14&1s^22s^22p^63s^23p^2&3&4&2\\
\hline O&8&1s^22s^22p^4&2&6&4\\
\hline\end{array}

Đáp án:

Giải thích các bước giải:

\begin{array}{|c|c|c|}\hline \text{nguyên tử}&\text{Z}&\text{cấu hình e}&\text{số lớp}&\text{lớp}&\text{phân lớp}\\\hline \text{H}&\text{1}&\text{$1s^2$}&\text{1}&\text{1}&\text{1}\\\hline \text{Li}&\text{3}&\text{$1s^2 2s^1$}&\text{2}&\text{1}&\text{1}\\\hline \text{Na}&\text{11}&\text{$1s^2 2s^2 2p^6 3s^1$}&\text{3}&\text{1}&\text{1}\\\hline\text{K}&\text{19}&\text{$1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 $}&\text{4}&\text{1}&\text{1}\\\hline\text{Ca}&\text{20}&\text{$1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 $}&\text{4}&\text{2}&\text{2}\\\hline\text{Mg}&\text{12}&\text{$1s^2 2s^2 2p^6 3s^2$}&\text{3}&\text{2}&\text{2}\\\hline \text{C}&\text{6}&\text{$1s^2 2s^2 2p^2$}&\text{2}&\text{4}&\text{2}\\\hline\text{Si}&\text{14}&\text{$1s^2 2s^2 2p^6 3s^2 3p^2 $}&\text{3}&\text{4}&\text{2}\\\hline\text{O}&\text{8}&\text{$1s^2 2s^2 2p^4$}&\text{2}&\text{6}&\text{4}\\\hline\end{array}