\(\begin{array}{l}
Na\,\,\,\,\,\,\,\,\,\,\,\,\,\, \to N{a^ + } + e\\
Mg\,\,\,\,\,\,\,\,\,\,\,\,\, \to M{g^{2 + }} + 2{\rm{e}}\\
Al\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \to A{l^{3 + }} + 3{\rm{e}}\\
Cl + e\,\,\,\,\,\,\,\,\, \to C{l^ - }\\
O + 2e\,\,\,\,\,\,\,\, \to {O^{2 - }}\\
S + 2e\,\,\,\,\,\,\,\, \to {S^{2 - }}
\end{array}\)
