Monatomic ions
70 element ion rows included.
Common Ion Charges
A combined chart for common element ions and polyatomic ions.
Polyatomic ions
16 common polyatomic ions included.
Formula rule
Ionic compounds should balance total positive and negative charge to zero.
Common ion charge chart
| Ion | Formula / Symbol | Charge | Type |
|---|---|---|---|
| Hydrogen | H | +1 | element ion |
| Hydrogen | H | -1 | element ion |
| Lithium | Li | +1 | element ion |
| Beryllium | Be | +2 | element ion |
| Boron | B | +3 | element ion |
| Carbon | C | -4 | element ion |
| Carbon | C | +4 | element ion |
| Nitrogen | N | -3 | element ion |
| Nitrogen | N | +3 | element ion |
| Nitrogen | N | +5 | element ion |
| Oxygen | O | -2 | element ion |
| Fluorine | F | -1 | element ion |
| Sodium | Na | +1 | element ion |
| Magnesium | Mg | +2 | element ion |
| Aluminum | Al | +3 | element ion |
| Silicon | Si | -4 | element ion |
| Silicon | Si | +4 | element ion |
| Phosphorus | P | -3 | element ion |
| Phosphorus | P | +3 | element ion |
| Phosphorus | P | +5 | element ion |
| Sulfur | S | -2 | element ion |
| Sulfur | S | +4 | element ion |
| Sulfur | S | +6 | element ion |
| Chlorine | Cl | -1 | element ion |
| Chlorine | Cl | +1 | element ion |
| Chlorine | Cl | +5 | element ion |
| Chlorine | Cl | +7 | element ion |
| Potassium | K | +1 | element ion |
| Calcium | Ca | +2 | element ion |
| Scandium | Sc | +3 | element ion |
| Titanium | Ti | +3 | element ion |
| Titanium | Ti | +4 | element ion |
| Vanadium | V | +2 | element ion |
| Vanadium | V | +3 | element ion |
| Vanadium | V | +4 | element ion |
| Vanadium | V | +5 | element ion |
| Chromium | Cr | +2 | element ion |
| Chromium | Cr | +3 | element ion |
| Chromium | Cr | +6 | element ion |
| Manganese | Mn | +2 | element ion |
| Manganese | Mn | +4 | element ion |
| Manganese | Mn | +7 | element ion |
| Iron | Fe | +2 | element ion |
| Iron | Fe | +3 | element ion |
| Cobalt | Co | +2 | element ion |
| Cobalt | Co | +3 | element ion |
| Nickel | Ni | +2 | element ion |
| Nickel | Ni | +3 | element ion |
| Copper | Cu | +1 | element ion |
| Copper | Cu | +2 | element ion |
| Zinc | Zn | +2 | element ion |
| Gallium | Ga | +3 | element ion |
| Germanium | Ge | +2 | element ion |
| Germanium | Ge | +4 | element ion |
| Arsenic | As | -3 | element ion |
| Arsenic | As | +3 | element ion |
| Arsenic | As | +5 | element ion |
| Selenium | Se | -2 | element ion |
| Selenium | Se | +4 | element ion |
| Selenium | Se | +6 | element ion |
| Bromine | Br | -1 | element ion |
| Bromine | Br | +1 | element ion |
| Bromine | Br | +5 | element ion |
| Rubidium | Rb | +1 | element ion |
| Strontium | Sr | +2 | element ion |
| Yttrium | Y | +3 | element ion |
| Zirconium | Zr | +4 | element ion |
| Niobium | Nb | +3 | element ion |
| Niobium | Nb | +5 | element ion |
| Molybdenum | Mo | +4 | element ion |
| Molybdenum | Mo | +6 | element ion |
| Technetium | Tc | +4 | element ion |
| Technetium | Tc | +7 | element ion |
| Ruthenium | Ru | +3 | element ion |
| Ruthenium | Ru | +4 | element ion |
| Rhodium | Rh | +3 | element ion |
| Palladium | Pd | +2 | element ion |
| Palladium | Pd | +4 | element ion |
| Silver | Ag | +1 | element ion |
| Cadmium | Cd | +2 | element ion |
| Indium | In | +1 | element ion |
| Indium | In | +3 | element ion |
| Tin | Sn | +2 | element ion |
| Tin | Sn | +4 | element ion |
| Antimony | Sb | -3 | element ion |
| Antimony | Sb | +3 | element ion |
| Antimony | Sb | +5 | element ion |
| Tellurium | Te | -2 | element ion |
| Tellurium | Te | +4 | element ion |
| Tellurium | Te | +6 | element ion |
| Iodine | I | -1 | element ion |
| Iodine | I | +1 | element ion |
| Iodine | I | +5 | element ion |
| Iodine | I | +7 | element ion |
| Cesium | Cs | +1 | element ion |
| Barium | Ba | +2 | element ion |
| Lanthanum | La | +3 | element ion |
| Cerium | Ce | +3 | element ion |
| Cerium | Ce | +4 | element ion |
| Praseodymium | Pr | +3 | element ion |
| Praseodymium | Pr | +4 | element ion |
| Neodymium | Nd | +3 | element ion |
| Promethium | Pm | +3 | element ion |
| Samarium | Sm | +2 | element ion |
| Samarium | Sm | +3 | element ion |
| Europium | Eu | +2 | element ion |
| Europium | Eu | +3 | element ion |
| Gadolinium | Gd | +3 | element ion |
| Terbium | Tb | +3 | element ion |
| Terbium | Tb | +4 | element ion |
| Dysprosium | Dy | +3 | element ion |
| Holmium | Ho | +3 | element ion |
| Erbium | Er | +3 | element ion |
| Thulium | Tm | +3 | element ion |
| Ytterbium | Yb | +2 | element ion |
| Ytterbium | Yb | +3 | element ion |
| Lutetium | Lu | +3 | element ion |
| Hafnium | Hf | +4 | element ion |
| Tantalum | Ta | +5 | element ion |
| Tungsten | W | +4 | element ion |
| Tungsten | W | +6 | element ion |
| Rhenium | Re | +4 | element ion |
| Rhenium | Re | +7 | element ion |
| ammonium | NH4 | +1 | polyatomic ion |
| hydroxide | OH | -1 | polyatomic ion |
| nitrate | NO3 | -1 | polyatomic ion |
| nitrite | NO2 | -1 | polyatomic ion |
| sulfate | SO4 | -2 | polyatomic ion |
| sulfite | SO3 | -2 | polyatomic ion |
| carbonate | CO3 | -2 | polyatomic ion |
| bicarbonate | HCO3 | -1 | polyatomic ion |
| phosphate | PO4 | -3 | polyatomic ion |
| acetate | C2H3O2 | -1 | polyatomic ion |
| chlorate | ClO3 | -1 | polyatomic ion |
| perchlorate | ClO4 | -1 | polyatomic ion |
| cyanide | CN | -1 | polyatomic ion |
| permanganate | MnO4 | -1 | polyatomic ion |
| chromate | CrO4 | -2 | polyatomic ion |
| dichromate | Cr2O7 | -2 | polyatomic ion |