ions

Cations

with only a single possible charge:

Li+ lithium H+ hydrogen Na+ sodium Ag+ silver Mg2+ magnesium Al3+ aluminum K+ potassium Ca2+ calcium Rb+ rubidium Sr2+ strontium Cs+ cesium Ba2+ barium NH4 + ammonium Zn2+ zinc

with more than one possible charge: Cr2+ chromium(II) Fe2+ iron(II) Cu+ copper(I) Sn2+ tin(II) Cr3+ chromium(III) Fe3+ iron(III) Cu2+ copper(II) Sn4+ tin(IV) Mn2+ manganese(II) Co2+ cobalt(II) Hg2 2+ mercury(I) Pb2+ lead(II) Mn3+ manganese(III) Co3+ cobalt(III) Hg2+ mercury(II) Pb4+ lead(IV) Mn4+ manganese(IV) Ni2+ nickel(II) Au+ gold(I) Ni3+ nickel(III) Au3+ gold(III)

Anions

Monatomic Anions H¯ hydride N3¯ nitride O2¯ oxide F¯ fluoride P3¯ phosphide S2¯ sulfide Cl¯ chloride Br¯ bromide I¯ iodide Polyatomic Anions OH¯ hydroxide CrO4 2¯ chromate C2H3O2¯ acetate Cr2O7 2¯ dichromate NO3¯ nitrate C2O4 2¯ oxalate NO2¯ nitrite O2 2¯ peroxide HSO4¯ bisulfate (aka hydrogen sulfate) SO4 2¯ sulfate HSO3¯ bisulfite (aka hydrogen sulfite) SO3 2¯ sulfite S2O3 2¯ thiosulfate HCO3¯ bicarbonate CO3 2¯ carbonate (aka hydrogen carbonate) H2PO4¯ dihydrogen phosphate HPO4 2¯ hydrogen PO4 3¯ phosphate phosphate MnO4¯ permanganate PO3 3¯ phosphite CN¯ cyanide OCN¯ cyanate SCN¯ thiocyanate ClO¯ hypochlorite BrO¯ hypobromite IO¯ hypoiodite ClO2¯ chlorite BrO2¯ bromite IO2¯ iodite ClO3¯ chlorate BrO3¯ bromate IO3¯ iodate ClO4¯ perchlorate BrO4¯ perbromate IO4¯ periodate

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