Đáp án:
Em tham khảo nhé
${\mathop N\limits^0 }_2,\mathop N\limits^{ + 4} {\mathop O\limits^{ - 2}}_2,{\rm{ }}\mathop N\limits^{ + 2} \mathop O\limits^{ - 2} ,{\rm{ }}{\mathop N\limits^{ + 1} }_2\mathop O\limits^{ - 2} ,S{\mathop O\limits^{ - 2} }_2,\mathop S\limits^0 ,\mathop H\limits^{ + 1} \mathop N\limits^{ + 5} {\mathop O\limits^{ - 2} }_3,\\\mathop K\limits^{ + 1} \mathop {Cl}\limits^{ + 5} {\mathop O\limits^{ - 2}}_3,\mathop K\limits^{ + 1} \mathop {Mn}\limits^{ + 7} {\mathop O\limits^{ - 2}}_4,\mathop {Mn}\limits^{ + 4} {\mathop O\limits^{ - 2}}_2,\mathop H\limits^{ + 1} \mathop {Cl}\limits^{ + 1} \mathop O\limits^{ - 2} ,\mathop H\limits^{ + 1} \mathop {Cl}\limits^{ + 5} {\mathop O\limits^{ - 2} }_3$
