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In situ availability: trace
Necessity: critical
Atomic number: 1
Atomic mass: 1.00794
group: 1
period: 1
normal phase: Gas
series: Non-metals
density: 0.08988 g/L
melting point: 14.175K
boiling point: 20.418K
N/A ← H → He
Atomic radius (pm): 25
Bohr radius (pm): 53
Covalent radius (pm): 37
Van der Waals radius (pm): 120
ionic radius (pm): -
1st ion potential (eV): 13.60
Electron Configuration
Electrons Per Shell
Electronegativity: 2.2
Electron Affinity:
Oxidation states: 1
Crystal structure: Hexagonal

Hydrogen is a Non-metal in group 1. It has a Hexagonal crystalline structure. This element has two stable isotopes: 1 and 2.

Natural Isotopes

  • 1H (single electron, single proton)
  • 2H Deuterium (single electron, single proton, single neutron)

Synthetic Isotopes

  • 3H Tritium (single electron, single proton, two neutrons)
    • 12.33 year half life. Undergoes Beta Decay to become Helium 3(He3 or 3He)
  • 4H
    • Undergoes immediate Neutron Decay to become Tritium(3H)

Hydrogen is the simplest, lightest, and first element formed after the big bang. It is the most common element, making up approx 90% of the universe by weight. Hydrogen is one of the highly useful and necessary elements believed to be in critically short supply on Luna. Its most common nuclear permutation (isotope) is a single proton, although it can also exist with one (deuterium) or two (tritium) neutrons. On Earth, hydrogen is most commonly found combined with oxygen in the form of water (H2O). The Moon is much smaller than Earth, hence its gravity is not strong enough to retain liquid oceans nor gaseous amtosphere; most of the volatiles of the Moon, including hydrogen, have long since evaporated and escaped into space.

Common uses of hydrogen which may be applied on the Moon include: rocket fuel, hydrogen fuel cells, ilmenite reduction, reduction of metal ores and nitrogen fixation. Deuterium/tritium can be as fuel used in nuclear fusion.

Hydrogen has possibly been detected at the Lunar poles, but the amount available has been a topic of controversy.

External Links

Environmental Chemistry: Hydrogen
WebElements: Hydrogen

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