Atoms within hydrogen halides are bound by covalent bonds, forming polar molecules.
One of the halogens, it may cause skin irritation.
Colorless, odorless, lighter-than-air gas. The most common chemical element in the universe.
A colorless gas with a pungent odor, its solution in water is called hydrochloric acid.
One of the hydrogen halides, a highly aggressive substance - it even attacks glass.
A colorless, heavier-than-air gas with a pungent odor.