| 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–^)

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