* New substances are formed: Electroplating involves the transfer of metal ions from a solution to a surface. This results in the formation of a new layer of metal on the surface, which is a different substance than the original materials.

* Chemical reactions are involved: The process relies on electrochemical reactions. An electric current drives the transfer of electrons, causing metal ions to be reduced (gain electrons) and deposit onto the surface.

* Irreversible process: The deposited metal layer is permanently bonded to the surface, and it's difficult to reverse the process without destroying the plating.

In contrast, a physical change only alters the form or appearance of a substance, not its chemical composition.