The particles in solids, liquids and gases

You saw on page 9 that a substance can change from solid to liquid to gas. The individual particles of the substance are the same in each state. It is their arrangement that is different  

The particles in a solid are packed tightly in a fbced pattern. There are strong forces holding them together, so they cannot leave their positions. 

The only movements they make are tiny vibrations to and fro. 

The particles in a liquid can move about and slide past each other. They are still close together but are not in a fixed pattern. The forces that hold them together are weaker than in a solid. 

The particles in a gas are far apart, and they move about very quickly, lliere are almost no forces holding them together. They collide with each other and bounce off in all directions. 

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