Final answer:
The correct formula for aluminum oxide, formed by combining Al³+ and O²- ions in a 2:3 ratio, is Al2O3. The correct answer is D. AI₂O₃.
Step-by-step explanation:
The correct formula for aluminum oxide is Al2O3. This ionic compound is formed by the combination of aluminum ions Al³+ and oxide ions O²-. Two aluminum ions, each with a +3 charge, pair with three oxide ions, each with a -2 charge, to create a neutral compound.
The resultant oxide consists of a 2:3 ratio of aluminum ions to oxide ions, which ensures electrical neutrality. Therefore, option D, Al2O3, is the correct formula for aluminum oxide.
Aluminum oxide, commonly known as alumina, is a compound made up of aluminum and oxygen, with the chemical formula Al2O3. It occurs naturally in various forms and is widely used in many industries due to its diverse properties.
Here are some key points about aluminum oxide:
Physical Properties: Aluminum oxide exists in different crystalline forms, including both minerals and synthetic varieties. It's a white or colorless crystalline solid with a high melting point. Variations in its structure and purity lead to differences in its properties, such as hardness and density.