Đề bài
Viết phương trình biểu diễn sự hình thành các ion sau đây từ các nguyên tử tương ứng:
\[\eqalign{& {\rm{a]}}\,\,{\rm{Na}}\,\, \to \,\,{\rm{N}}{{\rm{a}}^ + }\,\,\,\,\,\,\,\,\,;\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,d]\,\,Cl\,\, \to \,\,C{l^ - } \cr& b]\,\,Mg\,\, \to \,\,M{g^{2 + }}\,\,\,\,\,;\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,e]\,\,S\,\, \to {S^{2 - }} \cr& c]\,\,Al\,\, \to \,\,A{l^{3 + }}\,\,\,\,\,\,\,\,\,\,;\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,f]\,\,O\,\, \to {O^{2 - }} \cr} \]
Lời giải chi tiết
\[\eqalign{ & {\rm{a]}}\,\,{\rm{Na}}\,\, \to \,\,{\rm{N}}{{\rm{a}}^ + } + 1e;\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,d]\,\,Cl + 1e\,\, \to \,\,C{l^ - } \cr & b]\,\,Mg\,\, \to \,\,M{g^{2 + }} + 2e;\,\,\,\,\,\,\,\,\,\,\,e]\,\,S + 2e\,\, \to {S^{2 - }} \cr & c]\,\,Al\,\, \to \,\,A{l^{3 + }} + 3e;\,\,\,\,\,\,\,\,\,\,\,\,\,\,f]\,\,O + 2e\,\, \to {O^{2 - }} \cr} \]
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