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hydrogen Definition

hydro·gen (hī′drə jən)

noun

a flammable, colorless, odorless, gaseous chemical element, the lightest of all known substances: symbol, H; at. no., 1

Etymology: Fr hydrogène (see hydro- & -gen): coined (1787) by L. B. Guyton de Morveau (1737-1816), Fr chemist, in reference to the generation of water from the combustion of hydrogen

hydrogen Related Forms
hy·drog′·enous (hī dräj′ə nəs) adjective
hydrogen Usage Examples

Converse of object

  • bond: The core of the complex is extremely stable due to 16 hydrogen bonded layers that form, providing the driving force for the process.

Preposition: into

  • helium: Anyway, the sun does not " compress " hydrogen into helium, it burns it via nuclear fusion.

Adjective modifier

  • hydrogen-bonding: In this case it is the radius of the hydrogen-bonding hydrogens which is reduced, rather than the radius of the central nitrogen itself.
  • atomic: A H I nebula is made of neutral atomic hydrogen.
  • neutral: A H I nebula is made of neutral atomic hydrogen.
  • molecular: Molecular hydrogen ( H2 ) is under discussion to become the energy carrier of the future.
  • acidic: In the first case, only one of the acidic hydrogens has reacted with the hydroxide ions from the base.
  • metallic: Around this is a metallic hydrogen shell some 30,000 km deep.

Modifies a noun

  • peroxide: The hydrogen peroxide in honey is produced by an enzyme in the honey.
  • atom: In the Virgo cluster of galaxies they found a mass of hydrogen atoms a hundred million times the mass of the Sun.
  • bond: At the breaking surface, hydrogen bonds are ruptured, creating a zone of higher density water.
  • ion: The copper might react with the hydrogen ions or with the nitrate ions.
  • sulfide: Humans can smell hydrogen sulfide gas, the smell of rotten cabbage, in the parts per trillion range.
  • cyanide: Effects of hydrogen cyanide Hydrogen cyanide is the third constituent of nicotine thought to impair wound healing in cigarette smokers.

Noun used with modifier

  • disodium: Other ingredients are disodium hydrogen phosphate; phosphoric acid and/or sodium hydroxide may have been added for pH adjustment.
  • hydroxyl: A similar model was proposed with hydroxyl ions hydrogen bonding to surface H causing polarization and conductivity.
  • sodium: Place your finger over the nozzle, add about 5 cm 3 0.2 M sodium hydrogen carbonate solution.
  • backbone: Backbone amide hydrogens preferentially exchange for deuterium in D 2 O if solvent exposed.
  • potassium: Potassium hydrogen phthalate is what you're thinking of.

Preposition: by

  • electrolysis: Wind would be better served making a storable form of energy, such as hydrogen by electrolysis of water.
hydrogen Quotes

The pace of science forces the pace of technique. Theoretical physics forces atomic energy on us; the successful production of the fission bomb forces upon us the manufacture of the hydrogen bomb.We do not choose our problems, we do not choose our products; we are pushed, we are forcedöby what? Bya system which has no purpose and goal transcending it, and which makes man its appendix.

—Fromm, Erich