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Distance between Particles

Introduction to distance between particles:

 Particle is a minute quantity or fragment. It is a relatively small or the smallest discrete portion of amount of something. It is the basic unit of matter and energy such as a molecule, atom, proton, electron, or photon.

According to Kinetic molecular Theory,

  • All matter is composed of tiny particles.
  • These tiny particles of matter are in constant motion.
  • Solids, liquids and gases differ in the freedom of motion of their particles and the extent to which the particles interact.
  • The amount of motion is proportional to temperature. The particles move faster with the increase in temperature.

Nature and Distance between Particles in Solids, Liquids and Gases:

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 Solids, liquids and gases are the three main states of matter. The nature and distance between particles differs in Solids, Liquids and Gases as given below:


  • Solid particles of are tightly packed,
  • Solid particles vibrate about a fixed position,
  • Solids have a definite shape and  a definite volume,
  • Solids cannot be easily compressed because of very less free space between particles and
  • Solids do not flow because the particles cannot move or slide over one another.


  • Liquids have a definite volume, but do not have a definite shape since because of less tightly packed liquid particles as compared with solids,
  • Liquid particles are far enough apart to slide over one another and therefore, liquids flow easily and
  • Liquids cannot compress easily since there is less free space between particles as compared with gases.


  • Particles of gases are much far apart and move freely and therefore, gases do not have a definite shape or a definite volume,
  • Because of more free space between particles, gases can be easily compressed and
  • Because of the random and faster movement of the particles as compared with solids or liquids, Gases can flow very easily.

Distance between the Particles:

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The distance between the particles in different states of matter such as solids, liquids and gases are as shown in the figure below:

                       Distance between the particles:

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