There are three common phases of
matter: solid, liquid and gas. They can each be defined by the behavior
of their particles (atoms, ions or molecules).
Solid
In a solid, particles are locked in place relative to each other by the intermolecular attractions. This is why solid retain their shape and size.Liquid
In a liquid, particles are held
together by the intermolecular attractions but can move relative to each
other. This is what allows liquids to take the shape of their
container.
Gas
Gas particles behave independently.
Generally gas particles are very far apart (relative to their size), and
they move randomly. This is why gases take the shape of their container
and fill whatever container they are in.
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