Here's why:
* Aluminum oxide (Al₂O₃) is a very stable compound and is the most common oxide of aluminum. It's the primary component of bauxite ore, from which aluminum is extracted.
* Aluminum nitride (AlN) is another possible compound, but it's less likely to form in the presence of oxygen. Aluminum nitride is a ceramic material used in electronics and high-temperature applications.
Note: The specific conditions (temperature, pressure, ratios of reactants) can influence which compounds are formed. In most everyday scenarios, the reaction of aluminum with air would primarily result in the formation of aluminum oxide.
