An oxide is a chemical compound that consists of at least one oxygen atom bonded to another element. These compounds can form with metals, nonmetals, and metalloids, resulting in a wide variety of substances. Common examples include iron oxide, which is rust, and silicon dioxide, found in sand. Oxides can be classified as basic, acidic, or amphoteric, depending on their chemical properties and reactions with acids and bases. Oxides play a crucial role in various fields, including chemistry, materials science, and environmental science. They are essential in processes like combustion, where oxygen reacts with fuels, and in the production of ceramics and semiconductors. Understanding oxides helps scientists develop new materials and improve existing technologies.