Polyatomic Ions

OH -1

Hydroxide

CN -1

Cyanide

O2 -2

Peroxide

O2 -1

Superoxide

Hypo-ite

One Oxygen

-ite

Two Oxygen OR Lesser in a pair

-ate

Three Oxygen OR Greater in a pair

Per-ate

Four Oxygen

NH4 +1

Ammonium (only positively charged Polyatomic ion)

NO2 -1

Nitrite

NO3 -1

Nitrate

SO3 -1

Sulfite

SO4 -1

Sulfate

PO3 -3

Phosphite

PO4 -3

Phosphate

CO3 -2

Carbonate

HCO3 -2

Hydrogen Carbonate

HSO4 -1

Hydrogen Sulfate

MnO4 -1

Permanganate

CrO4 -2

Chromate

Cr2O4 -2

Dichromate

S2O3 -2

Thiosulfate

CH3CO2 -1

Acetate

HPO4 -2

Hydrogen Phosphate

H2PO4 -1

Dihydrogen Phosphate

CLO -1

Hypochlorite

CLO2 -1

Chlorite

CLO3 -1

Chlorate

CLO4 -1

Perchlorate

FO -1

Hypofluorite

FO2 -1

Fluorite

FO3 -1

Fluorate

FO4 -1

Perfluorate

BrO -1

Hypobromite

BrO2 -1

Bromite

BrO3 -1

Bromate

BrO4 -1

Perbromate

IO -1

Hypoiodite

IO2 -1

Iodite

IO3 -1

Iodate

IO4 -1

Periodate

Tin (SN) Charge

+II or +IV

Lead (Pb) Charge

+II or +IV

Thallium (Tl) Charge

+I or +III

Binary acid

Hydro + Part of element name + ic Acid

HF(aq)

Hydrofluoric acid

HCl(aq)

Hydrochloric acid

HBr(aq)

Hydrobromic acid

HI(aq)

Hydroiodic acid

HCN(aq)

Hydrocyanic acid

H2S(aq)

Hydrosulfuric acid

HP(aq)

Hydrophosphoric acid

Oxoacid

No Hydro Prefix

Oxoacid -ite

Change to -ous

Oxoacid -ate

Change to -ic