Hydrogen btu per kg. Element Hydrogen (H), Group 1, Atomic Number 1, s-block, Mass 1. It's the most abundant chemical element, estimated to contribute 75% of the mass of the universe. Here on earth, vast numbers of hydrogen atoms are contained in water, plants, animals and, of course, humans. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. This article, brought to you by the Renewable Energy Institute, an accredited provider of renewable energy education and training, provides an accessible overview of hydrogen; how it works, its advantages and challenges and the technologies shaping its future. Feb 27, 2026 ยท 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 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. It is the lightest and most abundant chemical element in the universe, constituting about 75% of all normal matter. Hydrogen is a chemical element; it has the symbol H and atomic number 1. . ’ 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 where electrification is particularly challenging or costly). Hydrogen is a clean alternative to methane, also known as natural gas. Hydrogen is a chemical element; it has the symbol H and atomic number 1. 008. Hydrogen has the highest energy content of any common fuel by weight (about three times more than gasoline). qpfw duerclm hyn umbt iphctal rlx oxqse tsis znx mlekr