Hydrogen

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Atomic symbol:	H
Atomic number:	1
Group:	1
Period:	1
Series:	Nonmetals

Natural Isotopes

H1
H2 Deuterium

Synthetic Isotopes

H3 Tritium
- 12.33 year half life. Undergoes Beta Decay to become Helium 3(He3)
H4
- Undergoes immediate Neutron Decay to become Tritium(H3)

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).

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.