Rusting is the iron oxide that covers metal objects, therefore it is not included as a physical change.
- It is commonly called oxidation chemical reactions in which oxygen combines with other substances, forming molecules called oxides.
- In chemistry oxidation is called the chemical phenomenon in which an atom, molecule or ion loses one or more electrons, thus increasing its positive charge.
- The physical changes of metals are changes that alter its shape without modifying its composition, this includes polishing, melting, bending, among others.
Therefore, we can conclude that the rusting of a metal corresponds to a chemical change due to the fact that it alters the molecular composition of said metal.
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