The atoms of a solid aluminum can are close together, vibrating in a rigid structure. If the can is warmed up on a hot plate, what happens to the atoms?

Since atoms of solid aluminium can are closer to each other, therefore, when heat is supplied then transfer of energy in the form of heat will be faster.

As a result, when can is warmed up then atoms of solid aluminium can will start to vibrate more because heat will decrease the force of attraction between the molecules.

Thus, atoms will start to move away from each other and hence, they will vibrate more.

the atoms will vibrate more.