cyanide
CN-
dihydrogenphosphate
H2PO- 4
ethanoate (acetate)
CH3 COO-
hydrogencarbonate
HCO- 3
hydrogensulfate
HSO- 4
nitrate
NO- 3
nitrite
NO- 2
permanganate
MnO- 4
carbonate
CO2- 3
chromate
CrO2- 4
dichromate
Cr2 O2- 7
hydrogenphosphate
HPO2- 4
oxalate
C2 O2- 4
oxide
O2-
sulfate
SO2- 4
sulfide
S2-
sulfite
SO2- 3
nitride
N3-
phosphate
PO3- 4