Do molecules in a solid move?

They vibrate ever so slightly.

Once a compound reaches Absolute Zero: 0 K, strange things start to happen. -At the molecular level, they vibrate within a very small radii, fixed in a crystalline structure, and with an extremely high frequency, they just can move very far. -if an electric current passes through a thin metal wire, such as on a microchip, the phenomenon known as electromigration occurs, and some atoms of the metal are actually physically pushed by the electrons opposite to the flow of current.