hydrogen, or H (chem. element)

• MICROPAEDIA
• MACROPAEDIA
• abundance and occurrence
  • aldehydes
  • cosmos [Ref 1], [Ref 2]; [Ref 3]
    • comets [Ref 1], [Ref 2]
    • H I regions
    • H II regions
    • interplanetary medium
    • interstellar medium [Ref 1]; [Ref 2]; [Ref 3]
    • Jupiter [Ref 1]; [Ref 2], [Ref 3]
    • Mars
    • meteorites
    • Moon
    • nebulae [Ref 1] passim to [Ref 2]
    • Neptune
    • primeval fireball
    • Saturn [Ref 1]; [Ref 2], [Ref 3]
    • solar system [Ref 1]; [Ref 2]
    • stars [Ref 1]; [Ref 2]; [Ref 3]
    • Sun [Ref 1], [Ref 2]
    • Uranus
  • Earth
    • atmosphere [Ref 1], [Ref 2]; [Ref 3]
    • oceans [Ref 1], [Ref 2]
    • protonosphere
  • gaseous refinery products
• applications
  • balloons
  • batteries
  • dye retention
  • flame-ionization detection
  • gasification
  • Haber-Bosch process
  • hydrogen masers
  • liquefaction
  • methanol production
  • petroleum refining
    • catalytic reforming
    • hydrocracking
    • hydrofining
  • proton mass
  • steady-state theory
  • steelmaking
  • synthetic diamonds
  • testing of ice sheets
  • thermonuclear bomb [Ref 1]; [Ref 2]
• biological aspects
  • intestinal gas
  • life-form composition
  • metabolism
  • muscle systems
  • photosynthesis
  • plant nutrition
• compounds
  • boron hydrides
  • carbohydrates
  • fossil fuels [Ref 1] passim to [Ref 2]
  • hydrides
  • hydrido complexes
  • hydrocarbons [Ref 1]; [Ref 2]
  • rubber
  • water [Ref 1]; [Ref 2]; [Ref 3]
• properties and structure
  • atomic energy levels [Ref 1], [Ref 2]; [Ref 3]
  • atomic structure [Ref 1], [Ref 2]
  • Aufbau principle
  • conservative forces
  • diatomic gas [Ref 1], [Ref 2]; [Ref 3]
  • excitation energy
  • fast neutrons interaction [Ref 1], [Ref 2]
  • high-pressure phenomena
  • isotopes
  • magnetic moment
  • mass spectrometry
  • molecular orbitals of H
  • spectra measurement
  • spontaneous process
  • stoichiometry
  • valence determination
• reactions
  • combustion
  • dissociation with iron cluster
  • hydrogenation
  • origin of heavier elements
  • oxidation-reduction [Ref 1]; [Ref 2]; [Ref 3]
  • proton-proton cycle
  • synthesis from ethane
• work of
  • Bohr
  • Cavendish
  • Hulst
  • Schrödinger
• for a list of related subjects see PROPAEDIA: Section 121
• see also hydrogen bond [Cross ref]; liquid hydrogen [Cross ref]; isotopes of hydrogen, e.g., deuterium [Cross ref]; tritium [Cross ref]; and compounds of hydrogen by name