Oxide compounds are chemical substances formed when oxygen combines with another element. They can be found in various forms, such as metals, nonmetals, and metalloids. Common examples include water (H₂O), carbon dioxide (CO₂), and iron oxide (Fe₂O₃). These compounds play essential roles in nature and industry, influencing processes like respiration and corrosion. Oxides can be classified into two main categories: basic oxides, which react with acids, and acidic oxides, which react with bases. Some oxides, like silicon dioxide (SiO₂), are neutral and do not readily react with acids or bases. Understanding oxide compounds is crucial for fields like chemistry, materials science, and environmental science.