physical weathering electric tin in stone to oxidize
zinc_chloride is not strong_electrolyte. rust is not oxidized_iron. uranium is not unalloyed_metal. snow is crystallized_water. uranium is unalloyed_metal. tin is unalloyed_metal. tin is not unalloyed_metal. zinc is unalloyed_metal. zinc is not unalloyed_metal. unalloyed_metal is not metal.