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The hydrogen molecules

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  • Hydrogen fluoride — is a chemical compound with the formula HF. It is the principal industrial source of fluorine, often in the aqueous form as hydrofluoric acid, and thus is the precursor to many important compounds including pharmaceuticals and polymers (e.g.… …   Wikipedia

  • Hydrogen halide — Hydrogen halides (or hydrohalic acids) are acids resulting from the chemical reaction of hydrogen with one of the halogen elements (fluorine, chlorine, bromine, iodine), which are found in Group 7 of the periodic table. Astatine is not included… …   Wikipedia

  • Hydrogen embrittlement — (or hydrogen grooving) is the process by which various metals, most importantly high strength steel, become brittle and crack following exposure to hydrogen. Hydrogen cracking can pose an engineering problem especially in the context of a… …   Wikipedia

  • Hydrogen fluoride laser — The hydrogen fluoride laser is an infrared chemical laser. It is capable of delivering continuous output power in the megawatt range. Hydrogen fluoride lasers operate at the wavelength of 2.7 2.9 µm. This wavelength is absorbed by the atmosphere …   Wikipedia

  • Hydrogen sulfide — Systematic name …   Wikipedia

  • Hydrogen bond — A hydrogen bond results from a dipole dipole force between an electronegative atom and a hydrogen atom bonded to nitrogen, oxygen or fluorine (thus the name hydrogen bond , which must not be confused with a covalent bond to hydrogen). The energy… …   Wikipedia

  • hydrogen — /huy dreuh jeuhn/, n. a colorless, odorless, flammable gas that combines chemically with oxygen to form water: the lightest of the known elements. Symbol: H; at. wt.: 1.00797; at. no.: 1; density: 0.0899 g/l at 0°C and 760 mm pressure. [1785 95;… …   Universalium

  • Hydrogen — This article is about the chemistry of hydrogen. For the physics of atomic hydrogen, see Hydrogen atom. For other meanings, see Hydrogen (disambiguation). ← hydrogen → helium …   Wikipedia

  • Hydrogen chloride — HCl redirects here. For the acid, see Hydrochloric acid. Hydrogen chloride …   Wikipedia

  • Hydrogen maser — A Hydrogen maser, also known as hydrogen frequency standard, is a specific type of maser that uses the intrinsic properties of the hydrogen atom to serve as a precision frequency reference.Both the proton and electron of a hydrogen atom have… …   Wikipedia

  • Hydrogen atom — Stable Isotope isotope name = Hydrogen 1 isotope filename = hydrogen 1.png alternate names = protium mass number = 1 symbol = H num neutrons = 0 num protons = 1 abundance = 99.985% mass = 1.007825 spin = ½+ excess energy = 7288.969 error1 = 0.001 …   Wikipedia

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