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  1. Hydrogen - Wikipedia

    Hydrogen is a chemical element; it has the symbol H and atomic number 1. It is the lightest and most abundant chemical element in the universe, constituting about 75% of all normal matter.

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

    Nov 27, 2025 · The earliest known chemical property of hydrogen is that it burns with oxygen to form water; indeed, the name hydrogen is derived from Greek words meaning ‘maker of water.’

  3. Hydrogen Energy Explained: Everything You Should Know

    Hydrogen energy is emerging as a key clean fuel in the global move toward sustainability, offering the potential to decarbonise industries, transport and energy systems. This article, brought to …

  4. Hydrogen explained - U.S. Energy Information Administration (EIA)

    Hydrogen occurs naturally on earth in compound form with other elements in liquids, gases, or solids. Hydrogen combined with oxygen is water (H 2 O). Hydrogen combined with carbon …

  5. Hydrogen - Department of Energy

    Nov 28, 2025 · Hydrogen has been described as the “Swiss army knife” of energy because it plays a key role in several sectors where there are limited or no viable alternatives (including …

  6. Hydrogen - Element information, properties and uses | Periodic …

    Element Hydrogen (H), Group 1, Atomic Number 1, s-block, Mass 1.008. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

  7. What Are the 5 Main Uses of Hydrogen? - Hydrogician

    May 16, 2025 · Hydrogen isn’t just a buzzword—it’s transforming industries from energy to aviation. Hydrogen is primarily used in refining, ammonia production, fuel cells, metal …

  8. Hydrogen | History, Uses, Facts, Physical & Chemical Characteristics

    Hydrogen is one of the three most abundant elements present on Earth. It was discovered in 1766 by Henry Cavendish and is widely used for various industrial, medical and recreational purposes.

  9. What is hydrogen? | National Grid

    Hydrogen is a clean alternative to methane, also known as natural gas. It's the most abundant chemical element, estimated to contribute 75% of the mass of the universe. Here on earth, …

  10. Hydrogen Factsheet - Center for Sustainable Systems

    Hydrogen is a feedstock and energy carrier used in multiple sectors. Global hydrogen demand reached 97 Mt in 2023, a 2.5% increase from 2022, with 10 Mt in the U.S. 1,2 Hydrogen is the …