Na2Ca3:Na: +1Ca: +2
MgCl3:Mg: +2Cl: -1
N2:N: 0
Ca3N2:Ca: +2N: -3
HClO4:H: +1Cl: +7O: -2
K2MnO4:K: +1Mn: +7O: -2
S:S: 0
AlI3:Al: +3I: -1
NCl5:N: +5Cl: -1
Al2S3:Al: +3S: -2
Na2Ca3:
Na: +1
Ca: +2
MgCl3:
Mg: +2
Cl: -1
N2:
N: 0
Ca3N2:
Ca: +2
N: -3
HClO4:
H: +1
Cl: +7
O: -2
K2MnO4:
K: +1
Mn: +7
O: -2
S:
S: 0
AlI3:
Al: +3
I: -1
NCl5:
N: +5
Cl: -1
Al2S3:
Al: +3
S: -2