Ionic charge reference

Periodic Table with Ionic Charges

This support page focuses on ionic charges rather than every possible oxidation state.

Download ionic charges PDF Download PNG

Ionic charge table

Common ionic charges by element

Use these charges for simple ions and introductory ionic compound formulas.

1HHydrogen+1, -1 2HeHeliumno common simple ion 3LiLithium+1 4BeBeryllium+2 5BBoron+3 6CCarbon-4, +4 7NNitrogen-3, +3, +5 8OOxygen-2 9FFluorine-1 10NeNeonno common simple ion 11NaSodium+1 12MgMagnesium+2 13AlAluminum+3 14SiSilicon-4, +4 15PPhosphorus-3, +3, +5 16SSulfur-2, +4, +6 17ClChlorine-1, +1, +5, +7 18ArArgonno common simple ion 19KPotassium+1 20CaCalcium+2 21ScScandium+3 22TiTitanium+3, +4 23VVanadium+2, +3, +4, +5 24CrChromium+2, +3, +6 25MnManganese+2, +4, +7 26FeIron+2, +3 27CoCobalt+2, +3 28NiNickel+2, +3 29CuCopper+1, +2 30ZnZinc+2 31GaGallium+3 32GeGermanium+2, +4 33AsArsenic-3, +3, +5 34SeSelenium-2, +4, +6 35BrBromine-1, +1, +5 36KrKryptonno common simple ion 37RbRubidium+1 38SrStrontium+2 39YYttrium+3 40ZrZirconium+4 41NbNiobium+3, +5 42MoMolybdenum+4, +6 43TcTechnetium+4, +7 44RuRuthenium+3, +4 45RhRhodium+3 46PdPalladium+2, +4 47AgSilver+1 48CdCadmium+2 49InIndium+1, +3 50SnTin+2, +4 51SbAntimony-3, +3, +5 52TeTellurium-2, +4, +6 53IIodine-1, +1, +5, +7 54XeXenonno common simple ion 55CsCesium+1 56BaBarium+2 57LaLanthanum+3 58CeCerium+3, +4 59PrPraseodymium+3, +4 60NdNeodymium+3 61PmPromethium+3 62SmSamarium+2, +3 63EuEuropium+2, +3 64GdGadolinium+3 65TbTerbium+3, +4 66DyDysprosium+3 67HoHolmium+3 68ErErbium+3 69TmThulium+3 70YbYtterbium+2, +3 71LuLutetium+3 72HfHafnium+4 73TaTantalum+5 74WTungsten+4, +6 75ReRhenium+4, +7 76OsOsmium+3, +4 77IrIridium+3, +4 78PtPlatinum+2, +4 79AuGold+1, +3 80HgMercury+1, +2 81TlThallium+1, +3 82PbLead+2, +4 83BiBismuth+3, +5 84PoPolonium+2, +4 85AtAstatine-1, +1 86RnRadonno common simple ion 87FrFrancium+1 88RaRadium+2 89AcActinium+3 90ThThorium+4 91PaProtactinium+4, +5 92UUranium+4, +6 93NpNeptunium+3, +4, +5, +6 94PuPlutonium+3, +4, +5, +6 95AmAmericium+3 96CmCurium+3 97BkBerkelium+3, +4 98CfCalifornium+3 99EsEinsteinium+3 100FmFermium+3 101MdMendelevium+2, +3 102NoNobelium+2, +3 103LrLawrencium+3 104RfRutherfordium+4 105DbDubnium+5 106SgSeaborgium+6 107BhBohrium+7 108HsHassium+8 109MtMeitneriumno common simple ion 110DsDarmstadtiumno common simple ion 111RgRoentgeniumno common simple ion 112CnCoperniciumno common simple ion 113NhNihonium+1, +3 114FlFlerovium+2, +4 115McMoscoviumno common simple ion 116LvLivermoriumno common simple ion 117TsTennessineno common simple ion 118OgOganessonno common simple ion

Alkali metals Alkaline earth metals Transition metals Halogens Nonmetals Noble gases Lanthanides Actinides

What this table shows

The table lists common simple ion charges, not every possible oxidation state. That keeps it useful for naming salts and writing formulas.

Where it needs care

Transition metals can use more than one charge. If a compound name includes a Roman numeral, use that value first.

How to use it

Pick one positive ion and one negative ion, then balance the total charge to zero. The ionic compound calculator can check the formula.

Next steps

Common ion chargesElement ions and polyatomic ions in one chart.Transition metal chargesCharges for iron, copper, nickel, chromium, manganese, and more.How to write ionic formulasA short guide to charge balance and parentheses.