Negative Ions (Acid radicals) Valency Table


| Valency = -1 | Valency = -2 | Valency = -3 | Valency = -4 | | :--- | :--- | :--- | :--- | | fluoride(F^1-^) | Carbonate (CO~3~)^2-^ | Nitride (N^3-^) | Carbide / methanide (C^4-^) | | chloride(Cl^1-^) | Sulphate (SO~4~)^2-^ | Phosphide (P^3-^) | Ferrocyanide [Fe(CN)~6~]^4-^ | | bromide(Br^1–^) | Oxide (O^2-^) | Phosphate / orthophosphate (PO~4~)^3-^ | Pyrophosphate (P~2~O~7~)^4-^ | | iodide(I^1–^) | Peroxide (O~2~)^2-^ | Ferricyanide [Fe(CN)~6~]^3-^ | | | nitrate(NO~3~)^1-^ | Sulphite (SO~3~)^2-^ | Borate / orthoborate (BO~3~)^3-^ | | | nitrite(NO~2~)^1-^ | Sulphide (S^2-^) | Arsenite (AsO~3~)^3-^ | | | bicarbonate/ hydrogen carbonate/ (HCO~3~)^1-^ | Thiosulphate (S~2~O~3~)^2-^ | Arsenate (AsO~4~)^3-^ | | | bisulphite/hydrogen sulphite(HSO~3~)^1-^ | Manganate (MnO~4~)^2-^ | | | | hypochlorite(OCl)^1-^ / (ClO)^1-^ | Chromate (CrO~4~)^2-^ | Cobaltinitrite [Co(NO~2~)~6~]^3-^ | | | Permanganate(MnO~4~)^1-^ | Dichromate (Cr~2~O~7~)^2-^ | Aluminate / orthoaluminate (AlO~3~)^3-^ | | | chlorite (ClO~2~)^1-^ | Oxalate (C~2~O~4~)^2-^ | Oxychloride(OCl)^3-^

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