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-).
