Pre-AP Chemistry
IONS
Memorizing the symbol and charge of ions is essential to your success in chemistry.
Make flash cards with the name of the ion on one side and the symbol and charge on the
other side.
Learn to use the periodic table for help with your ions. You will always have a
periodic table available for tests and quizzes.
Group IA
hydrogen H+
lithium Li+
sodium Na+
potassium K+
rubidium Rb+
cesium Cs+
Group IIA
beryllium Be2+
magnesium Mg2+
calcium Ca2+
strontium Sr2+
barium Ba2+
Group IIIA
aluminum Al3+
Group VA
nitride N3phosphide P3-
Group VIA
oxide O2sulfide S2selenide Se2-
Group VIIA
fluoride Fchloride Clbromide Briodide I-
Others: hydride H-
peroxide O22TRANSITION METALS
chromium (II) or chromous Cr2+
chromium (III) or chromic
Cr3+
manganese (II) or manganous Mn2+
manganese (III) or manganic
Mn3+
iron (II)
or ferrous
Fe2+
iron (III)
or ferric
Fe3+
cobalt (II)
or cobaltous Co2+
cobalt (III)
or cobaltic
Co3+
copper (I)
or cuprous
Cu+
copper (II)
or cupric
Cu2+
mercury (I)
or mercurous
Hg22+
mercury (II)
or mercuric
Hg2+
lead (II)
or plumbous
Pb2+
lead (IV)
or plumbic
Pb4+
tin (II)
or stannous
Sn2+
tin (IV)
or stannic
Sn4+
silver Ag+
cadmium Cd2+
zinc Zn2+
POLYATOMIC IONS
-1 charge
dihydrogen phosphate H2PO4acetate C2H3O2hydrogen sulfate HSO4(bisulfate)
hydrogen sulfite HSO3(bisulfite)
hydrogen carbonate HCO3(bicarbonate)
nitrite NO2nitrate NO3cyanide CNhydroxide OHpermanganate MnO4hypochlorite ClOchlorite ClO2chlorate ClO3perchlorate ClO4+1 charge
ammonium NH4+
-2 charge
hydrogen phosphate HPO42oxalate C2O42sulfite SO32sulfate SO42carbonate CO32chromate CrO42dichromate Cr2O72silicate SiO32-3 charge
phosphate PO43phosphite PO33-