Is iron rust an example of a physical or chemical change?

1 Answer
Nov 3, 2016


The rusting of iron is clearly an example of chemical change.


Chemical change is characterized by the formation of new substances and the making and breaking of strong chemical bonds. In these circumstances we break iron-iron bonds and oxygen-oxygen bonds, and form #Fe^(II)O# and #Fe^(III)O# bonds. See this older answer.