A hydride is a chemical compound that consists of hydrogen and another element. In these compounds, hydrogen typically has a negative charge, acting as a hydride ion (H⁻). Hydrides can form with various elements, including metals and nonmetals, and they can be classified into different types, such as ionic, covalent, and metallic hydrides. Hydrides play important roles in various fields, including chemistry and materials science. For example, metal hydrides are used in hydrogen storage systems, while covalent hydrides are found in organic compounds. Understanding hydrides is essential for advancements in energy storage and chemical reactions.