Particle

Particle may refer to:

In chemistry:
Colloidal particle, part of a one-phase system of two or more components

In physics:
Subatomic particle, which may be either:
Elementary particle, a particle of which larger particles are composed, also called a fundamental particle
Composite particle, a bound state between several elementary particles
Point particle, an idealized particle that does not have any volume

Particle is the basic structure of the whole things in world.We have learn it in many subject and this important to explain the theory based to the characteristic of particle.

refer-http://en.wikipedia.org/wiki/Particle