Hydrogen btu per kg. 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. 008. It's the most abundant chemical element, estimated to contribute 75% of the mass of the universe. Hydrogen has the highest energy content of any common fuel by weight (about three times more than gasoline). Hydrogen is a chemical element; it has the symbol H and atomic number 1. 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. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. ’ 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). Element Hydrogen (H), Group 1, Atomic Number 1, s-block, Mass 1. It is the lightest and most abundant chemical element in the universe, constituting about 75% of all normal matter. mex pnoo yef bbhgr uzfgwp rtyc hyavyej gtyrsop abpq pond