Question

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

Explanation:

Rusting is an oxidation - reaction. Iron reacts with oxygen in the presence of moisture to form iron oxide, which is rust. There is no sulfur involved in the basic rust - formation process.

Answer:

Iron and oxygen combine to form iron oxide.