what is a polyatomic ion?

Answer 1

A polyatomic ion is a molecule that bears ionic groups, that is, a molecule with a charge. The majority of biological compounds and inorganic species conform to this strict definition. Ordinarily however, the term refers to small collections of atoms, 3 to perhaps 50 atoms, such as many metal complexes and oxyanions such as sulfate. in Greek, the prefix poly- means "many," which to a chemist means three or more atoms.

Answer 2

A polyatomic ion is a molecule that bears ionic groups, that is, a molecule with a charge. The majority of biological compounds and inorganic species conform to this strict definition. Ordinarily however, the term refers to small collections of atoms, 3 to perhaps 50 atoms, such as many metal complexes and oxyanions such as sulfate. in Greek, the prefix poly- means "many," which to a chemist means three or more atoms.
To name the few :
Polyatomic ions
Acetate CH3COO− or C2H3O2−
Aluminate AlO2−, Al2O42−
Amide NH2−
Ammonium NH4+
Antimonate SbO43−
Antimonite SbO33−
Arsenate AsO43−
Arsenite AsO33−
Azide N3−
Benzoate C6H5COO−
Bicarbonate (hydrogen carbonate) HCO3−
Borate BO33−
Metaborate BO2−
Tetraborate B4O72−
Bromate BrO3−
Bromite BrO2−
Carbide C22−
Carbonate CO32−
Chlorate ClO3−
Chlorite ClO2−
Chromate CrO42−
Chromite CrO2−
Chromyl CrO22+
Citrate C6H5O73−
Cyanate OCN−
Cyanide CN− etc etc etc etc ....

Answer 3

A polyatomic ion is:


An electrostatic potential map of the nitrate ion (NO3−). Areas coloured red are lower in energy than areas coloured yellowA polyatomic ion is a molecule that bears ionic groups, that is, a molecule with a charge. The majority of biological compounds and inorganic species conform to this strict definition. Ordinarily however, the term refers to small collections of atoms, 3 to perhaps 50 atoms, such as many metal complexes and oxyanions such as sulfate. in Greek, the prefix poly- means "many," which to a chemist means three or more atoms.

Hydroxide ions and ammonium ions

A hydroxide ion is made of one oxygen atom and one hydrogen atom: its chemical formula is (OH)−. It has a charge of −1.
An ammonium ion is made up of one nitrogen atom and four hydrogen atoms: its chemical formula is (NH4)+. It has charge of +1.
A polyatomic ion can often be considered as the conjugate acid or conjugate base of a neutral molecule. For example the sulfate anion, SO42−, is derived from H2SO4 which can be regarded as SO3 + H2O.

There are two "rules" that can be used for the learning the nomenclature of polyatomic ions. First, when the prefix bi- is added to a name, a hydrogen is added to the ion's formula and its charge is increased by 1. It is a consequence of the hydrogen ion carrying a +1 charge. An alternate to the bi- prefix is to use the word hydrogen in its place: the anion derived from H+ + CO32−, HCO3− can be called either bicarbonate or hydrogencarbonate.

Answer 4

A polyatomic ion is a molecule that bears ionic groups, that is, a molecule with a charge. The majority of biological compounds and inorganic species conform to this strict definition. Ordinarily however, the term refers to small collections of atoms, 3 to perhaps 50 atoms, such as many metal complexes and oxyanions such as sulfate. in Greek, the prefix poly- means "many," which to a chemist means three or more atoms.

Answer 5

Polyatomic ion: ions that contain more than one atom and have an overall net charge

Answer 6

It is a group of atoms which are covelently bonded together, but the entire group carries a positive or negative charge. In a reaction, the group of atoms generally tends to stay bonded together as a group instead of breaking up.

EX:

sodium chloride + silver nitrate --> siver chloride + sodium nitrate

NaCl + AgNO3 --> AgCl + NaNO3

The nitrate (NO3) is a polyatomic ion. It remains bonded in a group during the reaction. It does not split into N and O during the reaction.