@wikipedia
Synonym: Chemical substance = Material
Aggregated form of matter consisting of molecules and/or atoms and/or ions.
It differs from Continuum body (or Medium) in that it is considered with reference to its molecular and corpuscular structure.
The chemical substances (materials) are divided into pure substances and mixtures.
See also
Natural Science / Physics / Chemistry
[ Pure substance ][ Mixtures ]
[ Organic chemical substance ][ Non-organic chemical substance ]
[ Hydrocarbons / Alkanes ]