Are the particles in a solid free to move?

Answer:
No. According to the Kinetic Particle Theory, the particles in a solid are fixed very close together in fixed positions. They are not free to move and can only vibrate about their fixed positions, due to the strong attractive forces between them. This explains why solids have fixed shapes.
First answer by Montyred. Last edit by Montyred. Contributor trust: 66 [recommend contributor recommended]. Question popularity: 1 [recommend question].