(AP Chem) Polyatomic List

Ammonium

(NH4)+

+1 charge

Hydronium

(H3O)+

+1 charge

Mercury I

(Hg2)2+

+1 charge

Dihydrogen Phosphate

(H2PO4)-

-1 Charge

Hydrogen Carbonate

(HCO3)-

-1 Charge

Hydrogen Sulfite

(HSO3)-

-1 Charge

Hydrogen Sulfate

(HSO4)-

-1 Charge

Nitrite

(NO2)-

-1 Charge

Nitrate

(NO3)-

-1 Charge

Hydroxide

(OH)-

-1 Charge

Acetate

(CH3COO)-

-1 Charge

Cyanide

(CN)-

-1 Charge

Cyanate

(CNO)-

-1 Charge

Thiocyanate

(CNS)-

-1 Charge

Superoxide

(O2)-

-1 Charge

Permanganate

(MnO4)-

-1 Charge

Hypochlorite

(ClO)-

-1 Charge

Chlorite

(CIO2)-

-1 Charge

Chlorate

(ClO3)-

-1 Charge

Perchlorate

ClO4-

-1 Charge

Bromate

(BrO3)-

-1 Charge

Iodate

(IO3)-

-1 Charge

Hydrogen Phosphate

(HPO4)2-

-2 Charge

Carbonate

(CO3)2-

-2 Charge

Sulfite

(SO3)2-

-2 Charge

Sulfate

(SO4)2-

-2 Charge

Thiosulfate

(S2O3)2-

-2 Charge

Silicate

(SiO3)2-

-2 Charge

Oxalate

(C2O4)2-

-2 Charge

Chromate

(CrO4)2-

-2 Charge

Dichromate

(Cr2O7)2-

-2 Charge

Molybdate

(MoO4)2-

-2 Charge

Peroxide

(O2)2-

-2 Charge

Phosphate

(PO4)3-

-3 Charge

Arsenate

(AsO4)3-

-3 Charge

H2O

Water

H2O2

Hydrogen Peroxide

NH3

Ammonia

N2H4

Hydrazine

C2H2

Acetylene

PH3

Phosphine

AsH3

Arsine

NO

Nitric Oxide

N2O

Nitrous oxide

CH4

Methane