Pure Substance

In chemistry, a chemical substance is a form of matter that has constant chemical composition and characteristic properties.

Element

each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter.

ATOM

the basic unit of a chemical element.

COMPOUND

a thing that is composed of two or more separate elements; a mixture.

HETEROGENIOUS

diverse in character or content.

HOMOGENEROUS MIXTURE

Homogeneous as a term in physical chemistry and material science refers to substances and mixtures which are in a single phase. This is in contrast to a substance that is heterogeneous.

SOLUTION

a liquid mixture in which the minor component (the solute) is uniformly distributed within the major component (the solvent).

SUSPENSION

the system of springs and shock absorbers by which a vehicle is cushioned from road conditions.

COLOID

a homogeneous, noncrystalline substance consisting of large molecules or ultramicroscopic particles of one substance dispersed through a second substance. Colloids include gels, sols, and emulsions; the particles do not settle and cannot be separated out by ordinary filtering or centrifuging like those in a suspension.

Comment Stream