Is tarnishing considered a physical or chemical change?
Chemical change is characterized by the formation of new substances, and the making and breaking of chemical bonds. When a metal tarnishes, typically copper, brass, silver, aluminum, or magnesium, it reacts with atmospheric oxygen to form a thin oxide coating. When iron tarnishes, we call the phenomenon
And then you have to tell your butler to polish the silverware with some (usually abrasive) metal cleaner.