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Understanding the particle model of matter

Particle model of matter • States of matter and density

Key concepts

What you'll likely be quizzed about

  • The particle model describes matter as being made of small particles.
  • These particles are constantly in motion and have different arrangements in solids, liquids, and gases.
  • The properties of these states can be explained by the behavior and interactions of these particles.

Flashcards

Test your knowledge with interactive flashcards

Explain why gases can expand to fill a container.

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Gas particles are spaced far apart and move rapidly, enabling them to spread out and occupy the entire volume of a container.

Key notes

Important points to keep in mind

Particles in solids are fixed in place and vibrate.

Liquids adapt to container shape while retaining volume.

Gasses expand to fill available space and are compressible.

Temperature influences particle movement and state transitions.

Pressure can affect the state of gases significantly.

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