What mineral is produced when two atoms of iron Chemically Combined With three Atoms of oxygen

Hematite

Explanation:

Hematite is created with two iron atoms to three oxygen atoms, and magnetite, with three iron atoms to four oxygen atoms,  which are both iron oxides.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs