Here's why:
* Electronegativity: Aluminum (Al) has an electronegativity of 1.61, while oxygen (O) has an electronegativity of 3.44. This large difference in electronegativity means that oxygen has a much stronger attraction for electrons than aluminum.
* Electron Transfer: When aluminum and oxygen react, oxygen atoms gain electrons from aluminum atoms. This results in the formation of aluminum ions (Al³⁺) and oxide ions (O²⁻).
* Electrostatic Attraction: The oppositely charged ions then attract each other through electrostatic forces, forming an ionic bond.
The resulting compound, aluminum oxide (Al₂O₃), is a solid with a high melting point, indicative of the strong ionic bonds present.
