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.

Feb 27, 2026 · 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.’

Hydrogen energy refers to the use of hydrogen as a clean and versatile energy carrier which is capable of storing, moving and delivering energy produced from diverse sources such as water, fossil fuels or …

Hydrogen can be produced, or separated, from a variety of sources—including water, fossil fuels, or biomass—and used as a source of energy or fuel. Hydrogen has the highest energy content of any …

Mar 5, 2026 · 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 in applications …

3 days ago · Hydrogen can be made several ways, from natural gas reforming to solar-powered electrolysis. Learn how each method works, what it costs, and why the source matters.

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

Hydrogen plays an incredibly large role in the workings of stars, but is also of vast importance on the Earth. It is rarely in its free state on Earth, instead it combines with many elements to form molecules …

May 4, 2025 · Hydrogen, represented by the symbol H and atomic number 1, is the lightest and most basic element in the universe. Its most abundant isotope, protium, contains only a single proton and …

Mar 9, 2026 · Scientists in Europe are developing a new PFAS-free way to produce green hydrogen using far less of the rare metal iridium. The effort could make clean hydrogen more affordable while …