Metals typically possess a shiny luster, are malleable (can be hammered into thin sheets), and are ductile (can be drawn into wires). They are good conductors of heat and electricity. For instance, iron and copper. Non-metals generally lack luster, are brittle (break easily when hammered), and are non-ductile. They are poor conductors of heat and electricity, with the exception of graphite. Examples include sulfur and oxygen.