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Answer:
In the particle model of matter, solid particles have the following characteristics:
1. **Fixed Arrangement**: Solid particles are arranged in a fixed, closely packed structure, often in a regular, repeating pattern. This gives solids a definite shape and volume.
2. **Strong Intermolecular Forces**: The particles in a solid are held together by strong intermolecular forces, which keep them in fixed positions relative to each other.
3. **Limited Movement**: Solid particles do not move freely; they can only vibrate around their fixed positions. This limited movement is why solids retain their shape and do not flow.
4. **Incompressibility**: Due to the close packing of particles, solids are generally incompressible. The particles are already as close together as they can be, leaving little to no space for further compression.
5. **High Density**: Solids typically have a higher density compared to liquids and gases because their particles are packed closely together.