A particle is an object with definite mass concentrated at a single location in space. The particle generally known as the fundamental particle is atom which is not true. It has been discovered through experiments that atom can be further subdivided into sub-atomic particles of protons, neutrons and electrons. Protons and neutrons are further made out of quarks. According to the experiments conducted till present date, quarks cannot be further divided. In layman sense, a particle is something that can be counted. It is not varied or continuous.