Hydrogen | Properties, Uses, & Facts | Britannica
Oct 30, 2024 · Hydrogen, a colorless, odorless, tasteless, flammable gaseous substance that is the simplest member of the family of chemical elements. 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 summary | Britannica
hydrogen, Lightest chemical element, chemical symbol H, atomic number 1. A colourless, odourless, tasteless, flammable gas , it occurs as the diatomic molecule H 2 . Its atom consists of one proton (the nucleus) and one electron; the isotope s deuterium and tritium have an additional one and two nuclear neutrons, respectively.
Hydrogen bonding | Definition, Examples, & Facts | Britannica
Nov 7, 2024 · hydrogen bonding, interaction involving a hydrogen atom located between a pair of other atoms having a high affinity for electrons; such a bond is weaker than an ionic bond or covalent bond but stronger than van der Waals forces.
Hydrogen - Fuel, Energy, Uses | Britannica - Encyclopedia Britannica
Oct 30, 2024 · Hydrogen - Fuel, Energy, Uses: The most important industrial method for the production of hydrogen is the catalytic steam–hydrocarbon process, in which gaseous or vaporized hydrocarbons are treated with steam at high pressure over a nickel catalyst at 650°–950° C to produce carbon oxides and hydrogen: CnH2n+2 + nH2O → nCO + (2n + 1)H2 ...
Hydrogen cyanide | Description, Uses, Effects, & Facts - Britannica
Oct 7, 2024 · Hydrogen cyanide, a highly volatile, colorless, and extremely poisonous liquid. A solution of hydrogen cyanide in water is called hydrocyanic acid, or prussic acid. It was discovered in 1782 by a Swedish chemist, Carl Wilhelm Scheele, who prepared it …
Photosynthesis | Definition, Formula, Process, Diagram, Reactants ...
6 days ago · Photosynthesis is the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.
Hydrogen ion | Definition, Charge, Formula, & Facts | Britannica
hydrogen ion, strictly, the nucleus of a hydrogen atom separated from its accompanying electron. The hydrogen nucleus is made up of a particle carrying a unit positive electric charge, called a proton. The isolated hydrogen ion, represented by the symbol H +, is therefore customarily used to represent a proton.
Hydrogen peroxide | Formula & Uses | Britannica
Oct 5, 2024 · 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 wood pulp, in the manufacture of other chemicals, as a rocket propellant, and for cosmetic and medicinal purposes.
Thermonuclear bomb | History, Principle, Diagram, Yield, Effects ...
Thermonuclear bomb, weapon whose explosive power results from an uncontrolled self-sustaining chain reaction in which isotopes of hydrogen combine under high temperatures to form helium in a process known as nuclear fusion.
Hydrogen chloride | Definition, Formula, Properties, & Facts
4 days ago · Hydrogen chloride, a compound of the elements hydrogen and chlorine, a gas at room temperature and pressure. Its chemical formula is HCl. A solution of the gas in water is called hydrochloric acid. Learn more about hydrogen chloride, including its properties.