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Chemical species
 
 
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Chemical species are atom
Atom

|-! bgcolor=gray | Properties|-||}The atom is a basic unit of matter consisting of a dense, central atomic nucleus surrounded by a electron cloud of electric charge electrons....
s, molecule
Molecule

In chemistry, a molecule is defined as a sufficiently stable, electric charge neutral group of at least two atoms in a definite arrangement held together by very strong chemical bonds....
s, molecular fragments, ion
Ion

An ion is an atom or molecule which has lost or gained one or more electrons, giving it a positive or negative electrical charge. According to the Bohr_model this will be from or in the outer shield 'n'....
s, etc., as entities being subjected to a chemical process
Chemical process

In a "Process " sense, a chemical process is a method or means of somehow changing one or more chemicals or chemical compounds. Such a chemical process can occur by itself or be caused by somebody....
 or to a measurement
Measurement

Measurement is the process of assigning a number to an attribute according to a rule or set of rules. The term can also be used to refer to the result obtained after performing the process....
. Generally, a chemical species can be defined as an ensemble of chemically identical molecular entities
Molecular entity

According to IUPAC Gold Book a molecular entity is any constitutionally or isotopically distinct atom, molecule, ion, ion pair, Radical , radical ion, complex, conformer, etc., identifiable as a separately distinguishable entity....
 that can explore the same set of molecular energy levels on a characteristic or delineated time scale. The term may be applied equally to a set of chemically identical atomic or molecular structural units in a solid array.

In supramolecular chemistry
Supramolecular chemistry

Supramolecular chemistry refers to the area of chemistry beyond the molecules focuses on the chemical systems made up of a discrete number of assembled molecular subunits or components....
, chemical species are those supramolecular structures whose interactions and associations are brought about via intermolecular bonding and debonding actions, and function to form the basis of this branch of chemistry.








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Chemical species are atom
Atom

|-! bgcolor=gray | Properties|-||}The atom is a basic unit of matter consisting of a dense, central atomic nucleus surrounded by a electron cloud of electric charge electrons....
s, molecule
Molecule

In chemistry, a molecule is defined as a sufficiently stable, electric charge neutral group of at least two atoms in a definite arrangement held together by very strong chemical bonds....
s, molecular fragments, ion
Ion

An ion is an atom or molecule which has lost or gained one or more electrons, giving it a positive or negative electrical charge. According to the Bohr_model this will be from or in the outer shield 'n'....
s, etc., as entities being subjected to a chemical process
Chemical process

In a "Process " sense, a chemical process is a method or means of somehow changing one or more chemicals or chemical compounds. Such a chemical process can occur by itself or be caused by somebody....
 or to a measurement
Measurement

Measurement is the process of assigning a number to an attribute according to a rule or set of rules. The term can also be used to refer to the result obtained after performing the process....
. Generally, a chemical species can be defined as an ensemble of chemically identical molecular entities
Molecular entity

According to IUPAC Gold Book a molecular entity is any constitutionally or isotopically distinct atom, molecule, ion, ion pair, Radical , radical ion, complex, conformer, etc., identifiable as a separately distinguishable entity....
 that can explore the same set of molecular energy levels on a characteristic or delineated time scale. The term may be applied equally to a set of chemically identical atomic or molecular structural units in a solid array.

In supramolecular chemistry
Supramolecular chemistry

Supramolecular chemistry refers to the area of chemistry beyond the molecules focuses on the chemical systems made up of a discrete number of assembled molecular subunits or components....
, chemical species are those supramolecular structures whose interactions and associations are brought about via intermolecular bonding and debonding actions, and function to form the basis of this branch of chemistry.

See also

List of particles
List of particles

This is a list of the different types of particles found or believed to exist in nature. For individual lists of the different particles, see the individual pages given below....