H-bomb; hydrogen bomb

hydrogen (gas)

hydrogenation

oxyhydrogen

hydrogenase (enzyme)

hydrogen bond

dehydrogenation

heavy hydrogen (isotope); deuterium

hydrogenated oil

hydrofluoric acid

hydrocyanic acid; hydrogen cyanide

hydrohalic acid (e.g. hydrofluoric acid HF 氫氟酸|氢氟酸[qing1 fu2 suan1], hydrochloric acid HCl 鹽酸|盐酸[yan2 suan1] etc)

hydrogen atom

hydrogen balloon

hydrofluorocarbon

hydrofluoric acid HF

(bound form) hydroxide of ...

hydroxide radical (-OH)

hydrochloric acid HCl; also written 鹽酸|盐酸[yan2 suan1]

hydrobromic acid HBr

hydrogen energy (energy derived from using hydrogen as a fuel)

hydrogen chloride HCl

arsine

hydrogen sulfide H2S; sulfureted hydrogen

hydrocarbon; same as 烴|烃[ting1]

dehydrogenase (enzyme)

(chemistry) tritium

dihydrotestosterone

a hydroxide

calcium hydroxide Ca(OH)2; slaked lime

sodium hydroxide NaOH; caustic soda

potassium hydroxide

aluminum hydroxide

magnesium hydroxide Mg(OH)2

hydroxide ion OH-

sodium bicarbonate

ammonium bicarbonate

hydrogen peroxide H2O2

Tetrahydrocannabinol, THC

hydroxide ion OH-

hydrocarbon

catalase (enzyme); hydrogen peroxidase

pyruvate dehydrogenase