How are the molecules arranged in a solid?

In a solid, the molecules are closely packed together due to strong intermolecular forces. These forces keep the molecules in fixed positions, which restricts their movement. Although the molecules do vibrate around their fixed positions, the overall motion is limited, resulting in a structured and stable arrangement. This close proximity and limited range of motion give solids their defined shape and volume, distinguishing them from liquids and gases, where the arrangement and movement of molecules vary significantly.