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Valency
+/-1 +/-2 +/-3
| Question | Answer |
|---|---|
| Hydrogen | (+1) H+ |
| Sodium | (+1) Na+ |
| Potassium | (+1) K+ |
| Lithium | (+1) Li+ |
| Copper (I) | (+1) Cu+ |
| Silver (I) | (+1) Ag+ |
| Ammonium | (+1) NH4 + |
| Chloride | (-1) Cl- |
| Bromide | (-1) Br- |
| Iodide | (-1) I- |
| Hydroxide | (-1) OH- |
| Nitrate | (-1) NO3 - |
| Hydrogen Carbonate | (-1) HCO3 - |
| Cyanide | (-1) CN- |
| Calcium | (+2) Ca2+ |
| Barium | (+2) Ba2+ |
| Magnesium | (+2) Mg2+ |
| Zinc | (+2) Zn2+ |
| Iron (II) | (+2) Fe2+ |
| Copper (II) | (+2) Cu2+ |
| Manganese | (+2) Mn2+ |
| Carbonate | (-2) CO3 2- |
| Sulfate | (-2) SO4 2- |
| Sulfide | (-2) S2- |
| Oxide | (-2) O2- |
| Aluminium | (3+) Al 3+ |
| Iron (III) | (3+) Fe 3+ |
| Phosphate | (3-) PO4 3- |
| Nitride | (3-) N3- |