In crystalline solids, the particles (atoms, molecules, or ions) are packed in a regularly ordered, repeating pattern. Solids can only change their shape by force, as when broken or cut. As a result, a solid has a stable, definite shape, and a definite volume. ![]() The forces between particles are strong so that the particles cannot move freely but can only vibrate. In a solid, the particles (ions, atoms or molecules) are closely packed together. ![]() Clockwise from top left, they are solid, liquid, plasma and gas, represented by an ice sculpture, a drop of water, electrical arcing from a tesla coil, and the air around clouds respectively.
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