Question

what happens during rusting of an iron nail? (1 point)
sulfur, iron, and oxygen combine to form iron sulfoxide.
iron and sulfur combine to form iron sulfide.
iron and oxygen combine to form iron oxide.
sulfur and oxygen combine to form a sulfur dioxide coating.

Explanation:

Rusting is an oxidation process of iron. Iron reacts with oxygen in the presence of moisture to form iron oxide, which is rust. Sulfur is not involved in the basic rust - forming reaction.

Answer:

Iron and oxygen combine to form iron oxide.