When the atoms of iron metal combine chemically with the atoms of oxygen gas a new solid substance is formed. What is the new substane?

When the atoms of iron metal combine chemically with the atoms of oxygen gas, they form iron oxide, commonly known as rust. The chemical reaction typically involves the oxidation of iron in the presence of moisture and oxygen, resulting in various forms of iron oxide, such as Fe2O3 or Fe3O4. This new solid substance is characterized by its reddish-brown color and is often found on corroded iron surfaces.