Which among the following compounds are formed when an alkali metal reacts with hydrogen and halogen respectively?
Metal hydride and metal halide
Alkali metals react with hydrogen to form metal hydride(MH) since hydrogen forms a hydride ion(H−).
Alkali metals react with halogens to form metal halide(MX) since halogen forms a halide ion(X−).
Hydrate means water molecules are associated with the element.