Hydrogen halide

Chemical compound consisting of hydrogen bonded to a halogen element

Hydrogen halide

In chemistry, hydrogen halides (hydrohalic acids when in the aqueous phase) are diatomic, inorganic compounds that function as Arrhenius acids. The formula is HX where X is one of the halogens: fluorine, chlorine, bromine, iodine, astatine, or tennessine. All known hydrogen halides are gases at standard temperature and pressure.

From Wikipedia, under CC BY-SA. More on occurri.