Mixture

A mixture contains two or more elements or compounds that are not chemically combined with one another. The chemical properties of each substance remain unchanged. Salt mixed with copper is an example: salt is a compound and copper is an element, but putting them together does not make a new compound.

A mixture contains two or more substances that are not chemically combined with one another. Adding salt to water produces a mixture, not a new compound. The salt and water retain their chemical properties and can be separated using physical methods.