-3+1
AsH3;
0
H2;
+1-2
H2O;
+1+6-2
H2SO4;
+1+3-2
H3AsO3;
Hg;
+2+5-2
Hg(NO3)2;
K2S;
K2SO4;
+1+2-2
K2ZnO2;
KNO2;
+1-2+1
KOH;
Na;
NaOH;
NH3-;
+4-2
NO2;
O2;
Zn;
+2+6-2
ZnSO4