Particle model and states of matter

What is a characteristic property of particles in a solid?

• They are free to move around randomly.

• They have weak forces of attraction between them.

• They are held in fixed positions in a regular lattice structure.

• They constantly move in straight lines until deflected.

What happens to the particles of a solid when it reaches its melting point?

• They gain enough energy to move around faster but remain in fixed positions.

• They lose energy and form stronger bonds, becoming more rigid.

• They gain enough energy to break free of their bonds and move around.

• They expand and fill the entire container.

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Which statement accurately describes the behavior of particles in a gas?

• They are held in fixed positions and vibrate.

• They have weak forces of attraction and a definite volume.

• They are constantly moving with random motion and will always fill a container.

• They are compact and tend to stick together.

What occurs when a liquid is cooled down to its freezing point?

• Particles gain energy and move faster, weakening forces.

• Particles lose energy, and more bonds form, fixing them in place.

• Particles break free from all bonds and spread out.

• Particles become compact but still flow to fit a container.