Difference between revisions of "Hydrogen"

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== Introduction ==
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'''Hydrogen''' is a Non-metal in group 1.
 
'''Hydrogen''' is a Non-metal in group 1.
 
It has a Hexagonal crystalline structure.
 
It has a Hexagonal crystalline structure.
 
This element has two stable isotopes: 1 and 2.   
 
This element has two stable isotopes: 1 and 2.   
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Natural Isotopes
 
Natural Isotopes
 
*<sup>1</sup>H  (single electron, single proton)
 
*<sup>1</sup>H  (single electron, single proton)
 
*<sup>2</sup>H Deuterium (single electron, single proton, single neutron)
 
*<sup>2</sup>H Deuterium (single electron, single proton, single neutron)
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Synthetic Isotopes
 
Synthetic Isotopes
 
*<sup>3</sup>H Tritium  (single electron, single proton, two neutrons)
 
*<sup>3</sup>H Tritium  (single electron, single proton, two neutrons)
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*<sup>4</sup>H  
 
*<sup>4</sup>H  
 
**Undergoes immediate Neutron Decay to become Tritium(<sup>3</sup>H)
 
**Undergoes immediate Neutron Decay to become Tritium(<sup>3</sup>H)
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'''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]] (H<sub>2</sub>O).  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.
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'''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.
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== Applications to Lunar Colonization ==
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Hydrogen has many proposed applications in a lunar environment. These include [[In-Situ_Propellant_Production#Hydrogen|rocket fuel]], energy storage, [[Ilmenite reduction#Hydrogen Reduction|reduction of metal]] and carbon oxides, and many other uses. Hydrogen production and recycling could become major functions of a lunar outpost.
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Deuterium could be used as fuel in nuclear fusion reactions, although the percentage of deuterium in lunar hydrogen is significantly less than on earth, which could make its production difficult.
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== Lunar Hydrogen Production ==
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The moon is significantly depleted of hydrogen compared to the earth. On earth, hydrogen is most commonly found combined with [[oxygen]] in the form of [[water]] (H<sub>2</sub>O).  The Moon is much smaller than Earth, and its gravity is not strong enough to retain a gaseous atmosphere permanently. In addition, the moon lacks a magnetic field, allowing the solar wind to directly interact with its surface, constantly stripping away any atmosphere it manages to cling to. As a result, most of the volatiles of the Moon, including hydrogen, have long since evaporated and escaped into space.
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However, hydrogen is constantly implanted into the lunar surface by the same solar wind that strips it away. As such, hydrogen is found in the lunar regolith in concentrations in the range of 40-50 parts per million. Methods of extracting hydrogen (along with other deposited volatiles) from the lunar surface have been proposed, usually involving heating the regolith until outgassing occurs (see [[Volatiles]]).
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In addition, more concentrated reserves of hydrogen exist in deep craters at the Lunar poles in the form of water ice. These craters are permanently shielded from the sun, and as such are quite cold (< 100 K). These areas act as cold traps for any volatiles that happen to pass into them, whether from comet impact or ongoing creation via the solar wind. As a result, they contain significant amounts of water, as well as other volatiles.
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Mining these polar deposits poses the problem of designing equipment capable of operating in extremely cold temperatures. In addition, the exact amount of resources available in these craters is not known, being a subject of some debate.  
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== Related Pages ==
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*[[Volatiles]]
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*[[Water Splitting]]
  
 
==External Links==
 
==External Links==
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{{Autostub}}
 
 
[[Category:Gases]]
 
[[Category:Gases]]
 
[[Category:Non-metals ]]
 
[[Category:Non-metals ]]

Revision as of 17:10, 4 August 2013

Hydrogen
H
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
-258.975°C
-434°F
boiling point: 20.418K
-252.732°C
-422.918°F
N/AN/AN/A
N/A ← H → He
N/ALiBe
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
1s1
Electrons Per Shell
1
Electronegativity: 2.2
Electron Affinity:
Oxidation states: 1
Magnetism:
Crystal structure: Hexagonal


Introduction

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.

Applications to Lunar Colonization

Hydrogen has many proposed applications in a lunar environment. These include rocket fuel, energy storage, reduction of metal and carbon oxides, and many other uses. Hydrogen production and recycling could become major functions of a lunar outpost.

Deuterium could be used as fuel in nuclear fusion reactions, although the percentage of deuterium in lunar hydrogen is significantly less than on earth, which could make its production difficult.

Lunar Hydrogen Production

The moon is significantly depleted of hydrogen compared to the earth. On earth, hydrogen is most commonly found combined with oxygen in the form of water (H2O). The Moon is much smaller than Earth, and its gravity is not strong enough to retain a gaseous atmosphere permanently. In addition, the moon lacks a magnetic field, allowing the solar wind to directly interact with its surface, constantly stripping away any atmosphere it manages to cling to. As a result, most of the volatiles of the Moon, including hydrogen, have long since evaporated and escaped into space.

However, hydrogen is constantly implanted into the lunar surface by the same solar wind that strips it away. As such, hydrogen is found in the lunar regolith in concentrations in the range of 40-50 parts per million. Methods of extracting hydrogen (along with other deposited volatiles) from the lunar surface have been proposed, usually involving heating the regolith until outgassing occurs (see Volatiles).

In addition, more concentrated reserves of hydrogen exist in deep craters at the Lunar poles in the form of water ice. These craters are permanently shielded from the sun, and as such are quite cold (< 100 K). These areas act as cold traps for any volatiles that happen to pass into them, whether from comet impact or ongoing creation via the solar wind. As a result, they contain significant amounts of water, as well as other volatiles.

Mining these polar deposits poses the problem of designing equipment capable of operating in extremely cold temperatures. In addition, the exact amount of resources available in these craters is not known, being a subject of some debate.


Related Pages

External Links

Environmental Chemistry: Hydrogen
WebElements: Hydrogen