Chemical hydrides are compounds formed by the reaction of hydrogen with other elements, typically metals or metalloids. They contain hydrogen atoms bonded to these elements, resulting in a variety of chemical properties. Hydrides can be classified into different types, such as ionic, covalent, and metallic hydrides, depending on the nature of the bonding. These compounds are important in various applications, including energy storage and production. For example, metal hydrides are used in hydrogen storage systems, while covalent hydrides can serve as reducing agents in chemical reactions. Understanding chemical hydrides is essential for advancements in materials science and energy technology.