Common polyatomic ions

Cyanide

A cyanide is a chemical compound that contains the group C≡N. This group, known as the cyano group, consists of a carbon atom triple-bonded to a nitrogen atom.

Perchlorate

A perchlorate is a chemical compound containing the perchlorate ion, ClO⁻ ₄.

permanganate

A permanganate is the general name for a chemical compound containing the manganate(VII) ion, (MnO − 4. ).

Dihydrogen Phosphate

Ammonium dihydrogen phosphate, also known as monoammonium phosphate is a chemical compound with the chemical formula.NH4H2PO4

Iodate

An iodate is a conjugate base of iodic acid. In the iodate anion, iodine is bonded to three oxygen atoms and the molecular formula is IO⁻ ₃.

bicarbonbate

Bicarbonate, also known as HCO3, is a byproduct of your body's metabolism. Your blood brings bicarbonate to your lungs, and then it is exhaled as carbon dioxide

chromate

Chromate salts contain the chromate anion, CrO²⁻ ₄. Dichromate salts contain the dichromate anion, Cr ₂O²⁻ ₇.

Dichromate

Dichromate salts contain the dichromate anion, Cr ₂O²⁻ ₇.

Hydroxide

Hydroxide is a diatomic anion with chemical formula OH⁻. It consists of an oxygen and hydrogen atom held together by a covalent bond, and carries a negative electric charge.

Carbonate

In chemistry, a carbonate is a salt of carbonic acid (H2CO3), characterized by the presence of the carbonate ion, a polyatomic ion with the formula of CO 2− 3. .

Hypochlorite

In chemistry, hypochlorite is an ion with the chemical formula ClO⁻. It combines with a number of cations to form hypochlorites, which may also be regarded as the salts of hypochlorous acid.

Manganate

In inorganic nomenclature, a manganate is any negatively charged molecular entity with manganese as the central atom. However, the name is usually used to refer to the tetraoxidomanganate anion, MnO²⁻ ₄,

Hydrogen Phosphate

It consists of one central phosphorus atom surrounded by four oxygen atoms in a tetrahedral arrangement. The phosphate ion carries a −3 formal charge and is the conjugate base of the hydrogen phosphate ion, H(PO. 4) 2− , which is the conjugate base of H.

Nitrate

Nitrate is a polyatomic ion with the molecular formula NO − 3. .

Oxalate

Oxalate is a naturally occurring molecule found in abundance in plants and humans. It's not a required nutrient for people, and too much can lead to kidney stones. In plants, oxalate helps to get rid of extra calcium by binding with it.

Benzoate

Sodium benzoate is a substance which has the chemical formula C₆H₅COONa. It is a widely used food preservative, with an E number of E211.

Bisulfate

Sodium bisulfate, also known as sodium hydrogen sulfate, is the sodium salt of the bisulfate anion, with the molecular formula NaHSO₄.

Bisulfite

Sodium bisulfite (or sodium bisulphite, sodium hydrogen sulfite) is a chemical compound with the chemical formula NaHSO3.

Thiosulfate

Sodium thiosulfate is an inorganic compound with the formula Na₂S₂O₃xH₂O.

sulfite

Sulfites or sulphites are compounds that contain the sulfite ion, SO²⁻ ₃.

Bromate

The bromate anion, BrO⁻ ₃, is a bromine-based oxoanion. A bromate is a chemical compound that contains this ion.

Cholrate

The chlorate anion has the formula ClO⁻ ₃. In this case, the chlorine atom is in the +5 oxidation state.

Chlorite

The chlorites are a group of phyllosilicate minerals. Chlorites can be described by the following four endmembers based on their chemistry via substitution of the following four elements in the silicate lattice; Mg, Fe, Ni, and Mn.

Cyanate

The cyanate ion is the anion with the chemical formula written as [OCN]− or [NCO]−.

Hydronium

The hydronium ion or hydronium is the name given to the H3O+cation, derived from the protonation of water.

Nitrite

The nitrite ion, which has the chemical formula NO⁻ ₂.

Sulfate

The sulfate or sulphate ion is a polyatomic anion with the empirical formula SO²⁻ ₄.

Ammonium

cation is a positively charged polyatomic cation with the chemical formula NH4+

Acetate

describes the conjugate base or ion typically found in aqueous solution and written with the chemical formula C ₂H ₃O⁻ ₂

Peroxide

peroxide is a chemical compound with the formula H ₂O ₂