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  1. Hydrogen | Properties, Uses, & Facts | Britannica

    Oct 17, 2025 · Elementary hydrogen finds its principal industrial application in the manufacture of ammonia (a compound of hydrogen and nitrogen, NH 3) and in the hydrogenation of carbon …

  2. Hydrogen - Fuel, Energy, Uses | Britannica

    Oct 17, 2025 · Hydrogen has been used as a primary rocket fuel for combustion with oxygen or fluorine and is favoured as a propellant for nuclear-powered rockets and space vehicles.

  3. Hydrogen peroxide | Formula & Uses | Britannica

    Nov 21, 2025 · hydrogen peroxide, (H 2 O 2), a colourless liquid usually produced as aqueous solutions of various strengths, used principally for bleaching cotton and other textiles and …

  4. Hydrogen cyanide | Description, Uses, Effects, & Facts | Britannica

    Nov 17, 2025 · Hydrogen cyanide and its compounds are used for many chemical processes, including fumigation, the case hardening of iron and steel, electroplating, and the …

  5. Thermonuclear bomb | History, Principle, Diagram, Yield, Effects ...

    Hydrogen (H) “burning” initiates the fusion energy source of stars and leads to the formation of helium (He). Generation of fusion energy for practical use also relies on fusion reactions …

  6. Hydrogen chloride | Definition, Formula, Properties, & Facts

    Hydrogen chloride is commonly prepared both on a laboratory and on an industrial scale by the reaction of a chloride, generally that of sodium (NaCl), with sulfuric acid (H 2 SO 4).

  7. Cyanide | Definition, Uses, & Effects | Britannica

    Oct 3, 2025 · Hydrocyanic acid, also known as hydrogen cyanide (HCN), is a highly volatile liquid. HCN is manufactured via the Andrussow process, in which methane, ammonia, and oxygen …

  8. Hydrogen - Reactivity, Uses, Properties | Britannica

    Oct 17, 2025 · Hydrogen - Reactivity, Uses, Properties: One molecule of hydrogen dissociates into two atoms (H2 → 2H) when an energy equal to or greater than the dissociation energy …

  9. Hydrogen sulfide | chemical compound | Britannica

    Oct 11, 2025 · hydrogen sulfide, colourless, extremely poisonous, gaseous compound formed by sulfur with hydrogen (see sulfur).

  10. Syngas | Description, Production, Uses, Advantages,

    At high temperatures and in the presence of steam or oxygen, gasification converts carbon-containing materials into hydrogen, carbon monoxide, and carbon dioxide, without a need for …