16. Which chemical reaction involves corrosion?

A. The surface of the objects changes from one element into another element.

B. The surface of the object changing from an element to a compound.

C. The inside of the object changing from an element to a compound.

D. Nothing happens

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• corrosion, wearing away due to chemical reactions, mainly oxidation (see oxidation-reduction, oxide). It occurs whenever a gas or liquid chemically attacks an exposed surface, often a metal, and is accelerated by warm temperatures and by acids and salts.

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