Polyatomic ion

molecular ionpolyatomicpolyatomic anionpolyatomic anionsiondiatomic anionionspoly-polyanionpolyatomic cation
A polyatomic ion, also known as a molecular ion, is a charged chemical species (ion) composed of two or more atoms covalently bonded or of a metal complex that can be considered to be acting as a single unit.wikipedia
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Ion

cationanionions
A polyatomic ion, also known as a molecular ion, is a charged chemical species (ion) composed of two or more atoms covalently bonded or of a metal complex that can be considered to be acting as a single unit.
Ions consisting of only a single atom are termed atomic or monatomic ions, while two or more atoms form molecular ions or polyatomic ions.

Hydroxide

OHhydroxide ionOH −
An example of a polyatomic ion is the hydroxide ion; consisting of one oxygen atom and one hydrogen atom, hydroxide has a charge of −1.
Hydroxide is a diatomic anion with chemical formula OH −.

Ammonium

ammonium saltammonium ionNH 4 +
An ammonium ion consists of one nitrogen atom and four hydrogen atoms: it has a charge of +1, and its chemical formula is NH4+.
The ammonium cation is a positively charged polyatomic ion with the chemical formula.

Salt (chemistry)

saltsaltspotassium salt
Polyatomic ions are often useful in the context of acid-base chemistry or in the formation of salts.
These component ions can be inorganic, such as chloride (Cl − ), or organic, such as acetate ; and can be monatomic, such as fluoride (F − ) or polyatomic, such as sulfate.

Molecule

molecularmoleculesmolecular structure
A polyatomic ion can often be considered as the conjugate acid or base of a neutral molecule.
However, in quantum physics, organic chemistry, and biochemistry, the term molecule is often used less strictly, also being applied to polyatomic ions.

Sulfate

sulfatessulphateSO 4
For example, the conjugate base of sulfuric acid (H 2 SO 4 ) is the polyatomic hydrogen sulfate anion (HSO4-).
The sulfate or sulphate (see spelling differences) ion is a polyatomic anion with the empirical formula.

Nitrite

nitritesNO 2 − nitrite ion
The nitrite ion, which has the chemical formula.

Nitrate

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

Phosphate

phosphatesphosphate groupinorganic phosphate
The phosphate ion is a polyatomic ion with the empirical formula and a molar mass of 94.97 g/mol.

Tellurate

Orthotelluratetellurate ion
In the naming of inorganic compounds it is a suffix that indicates a polyatomic anion with a central tellurium atom.

Carbonate

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

Citric acid

citratecitriccitrates
A citrate is a derivative of citric acid; that is, the salts, esters, and the polyatomic anion found in solution.

Acetate

diacetateacetatesacetate ion
The simplest of these is hydrogen acetate (called acetic acid) with corresponding salts, esters, and the polyatomic anion, or.

Bicarbonate

hydrogen carbonateHCO 3 HCO 3 −
It is a polyatomic anion with the chemical formula.

Phosphonium

phosphonium salttriphenylphosphine dibromidePH 4 I
The phosphonium (more obscurely: phosphinium) cation describes polyatomic cations with the chemical formula (R = H, alkyl, aryl, halide).

Monatomic ion

monatomiccopper type IImonatomic cation
*Monatomic ion
If an ion contains more than one atom, even if these are of the same element, it is called a polyatomic ion.

Hydronium

hydronium ionH 3 O + hydrogen ions
Hydronium is an abundant molecular ion in the interstellar medium and is found in diffuse and dense molecular clouds as well as the plasma tails of comets.

Chemical species

specieschemical componentaqueous species
A polyatomic ion, also known as a molecular ion, is a charged chemical species (ion) composed of two or more atoms covalently bonded or of a metal complex that can be considered to be acting as a single unit.

Covalent bond

covalentcovalentlycovalently bonded
A polyatomic ion, also known as a molecular ion, is a charged chemical species (ion) composed of two or more atoms covalently bonded or of a metal complex that can be considered to be acting as a single unit.

Coordination complex

coordination chemistrycomplexcomplexes
A polyatomic ion, also known as a molecular ion, is a charged chemical species (ion) composed of two or more atoms covalently bonded or of a metal complex that can be considered to be acting as a single unit.

Radical (chemistry)

free radicalradicalfree radicals
In older literature, a polyatomic ion is also referred to as a radical, and less commonly, as a radical group.

Elementary charge

eelectron chargecharge
An example of a polyatomic ion is the hydroxide ion; consisting of one oxygen atom and one hydrogen atom, hydroxide has a charge of −1.

Acid–base reaction

acid-base reactionacid-baseacid-base chemistry
Polyatomic ions are often useful in the context of acid-base chemistry or in the formation of salts.

Conjugate acid

conjugate baseconjugateconjugate bases
A polyatomic ion can often be considered as the conjugate acid or base of a neutral molecule.

Sulfuric acid

sulphuric acidsulfuricH 2 SO 4
For example, the conjugate base of sulfuric acid (H 2 SO 4 ) is the polyatomic hydrogen sulfate anion (HSO4-).