III I
PCl₃
II II
ZnS
II III
Ca₃N₂
IV II
MnO₂
VI II
MnO₃
VII II
Mn₂O₇
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III I
PCl₃
II II
ZnS
II III
Ca₃N₂
IV II
MnO₂
VI II
MnO₃
VII II
Mn₂O₇