Interactive Chemistry Worksheets for Students


Periodic table

Naming compounds

Basic formula

Simple compounds

Ionic compounds 1

Ionic compounds 2

Chemical suffixes

Old chemical names

Hydrocarbons - Alkanes

Alkanes, alkenes & alkynes

Alkanols to alkanoic acids


Common compounds

Common formula quiz

Acids, bases and salts

Covalent compounds

Printable worksheets



What is the particle theory of matter?

The particle theory of states

  • All matter is made up of particles.
  • All particles are attracted to one another.
  • All particles are constantly moving.
  • Temperature is a measure of the average speed of the particles.

This theory can be used to help explain some of the properties of matter.

The Properties of Solids, Liquids and Gases and the Particle Theory

  Solid Liquid Gas
  • fixed shape
  • fixed volume
  • cannot be compressed
  • no diffusion*
  • variable shape
  • fixed volume
  • cannot be compressed
  • slow diffusion*
variable shape
variable volume
can be compressed
rapid diffusion*
Beaker  Beaker with solid  Beaker with liquid  Beaker with gas


 Conical flask with solid  Conical flask with liquid  Conical flask with gas


The particles are close together and are vibrating in fixed positions.

The particles are close together and are moving slowly over one another. The particles are far apart and are moving quickly past one another.

 * Diffusion is the random movement of particles from an area of high concentration to an area of low concentration.