(chemistry) Used other than figuratively or idiomatically: see hydrogen, ion. ; H⁻ or H⁺

(obsolete, inorganic chemistry) The compound arsine.

(obsolete, chemistry) Stibine.

(obsolete, chemistry) methane

(chemistry) the process of forming a hydrogen bond

(chemistry) Any acid that contains at least one atom of hydrogen. / (industrial) hydrofluoric acid.

(inorganic chemistry) The compound arsine, H₃As or AsH₃.

(chemistry) chlorous acid

(chemistry) chloric acid

(chemistry) nitric acid