Sodium - Revision history

Strangelv: Lunar Cement renamed to Lunar Cement

2019-04-10T21:30:13Z

Lunar Cement renamed to Lunar Cement

Farred: fix typo

2015-06-16T01:23:13Z

fix typo

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2015-05-30T23:12:30Z

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2012-10-27T02:39:03Z

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2012-10-26T20:48:49Z

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2012-10-26T20:47:12Z

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2012-10-26T19:35:38Z

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Strangelv: category capitalization fix

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 This element has a stable isotope of 23
 <BR/><BR/>
-On the Moon NaK, a sodium potassium alloy, is one of the few substances that can be liquid in the ambient vacuum conditions for a considerable length of time.  At the eutectic concentrations of Na & K the alloy stays liquid from -12 to over 700 Celsius.  At the low temperature end the vapor pressure is low enough that the liquid takes a reasonable time to evaporate in the conditions Luna's outdoor environment.  This liquid can be alloyed with a powdered addition of other metals at low temperature, perhaps making a [[Structural Engineering|Lunar Cement]].
+On the Moon NaK, a sodium potassium alloy, is one of the few substances that can be liquid in the ambient vacuum conditions for a considerable length of time.  At the eutectic concentrations of Na & K the alloy stays liquid from -12 to over 700 Celsius.  At the low temperature end the vapor pressure is low enough that the liquid takes a reasonable time to evaporate in the conditions Luna's outdoor environment.  This liquid can be alloyed with a powdered addition of other metals at low temperature, perhaps making a [[Lunar Cement]].
 As an [[Electrical Conductors|electrical conductor]] a cable made of sodium would need to have about three times the cross sectional area to have the same electrical conductivity as a cable made of copper.  However, since copper is more than nine times as dense as sodium, the copper cable would be more than three times as heavy as the one made of sodium.  Sodium might have been used as an electrical conductor on Earth if it did not have some undesirable properties.  It is a fire hazard.  It reacts with water to give off hydrogen which can explode.  A chemical product of the reaction of sodium and water (lye) can cause chemical burns.  Although these things are very inconvenient on Earth, there is no fire hazard, no explosion hazard, and no possibility of chemical burns when an electrical conductor made of sodium remains out of doors on Luna.  One way of preventing such a cable from melting in the sun at 97.7 Celsius is to use it to conduct electricity in the polar area at the bottom of a zig zag ditch so the sun can never shine on the bottom of the ditch no matter what direction it shines from.  In the equatorial regions of Luna, where daytime temperatures get higher than the melting point of sodium, an iron or aluminum pipe filled with sodium would make a good electrical conductor.
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 [[Category:Critical and Essential Elements]]
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 This element has a stable isotope of 23
 <BR/><BR/>
-On the Moon NaK, a sodium potassium alloy, is one of the few substances that can be liquid in the ambient vacuum conditions for a considerable length of time.  At the eutectic concentrations of Na & K the alloy stays liquid from -12 to over 700 Celsius.  At the low temperature end the vapor pressure is low enough that the liquid takes a reasonable time to evaporate in the conditions Luna's outdoor environment.  This liquid can be alloyed with a powdered addition other metals at low temperature, perhaps making a [[Structural Engineering|Lunar Cement]].
+On the Moon NaK, a sodium potassium alloy, is one of the few substances that can be liquid in the ambient vacuum conditions for a considerable length of time.  At the eutectic concentrations of Na & K the alloy stays liquid from -12 to over 700 Celsius.  At the low temperature end the vapor pressure is low enough that the liquid takes a reasonable time to evaporate in the conditions Luna's outdoor environment.  This liquid can be alloyed with a powdered addition of other metals at low temperature, perhaps making a [[Structural Engineering|Lunar Cement]].
 As an [[Electrical Conductors|electrical conductor]] a cable made of sodium would need to have about three times the cross sectional area to have the same electrical conductivity as a cable made of copper.  However, since copper is more than nine times as dense as sodium, the copper cable would be more than three times as heavy as the one made of sodium.  Sodium might have been used as an electrical conductor on Earth if it did not have some undesirable properties.  It is a fire hazard.  It reacts with water to give off hydrogen which can explode.  A chemical product of the reaction of sodium and water (lye) can cause chemical burns.  Although these things are very inconvenient on Earth, there is no fire hazard, no explosion hazard, and no possibility of chemical burns when an electrical conductor made of sodium remains out of doors on Luna.  One way of preventing such a cable from melting in the sun at 97.7 Celsius is to use it to conduct electricity in the polar area at the bottom of a zig zag ditch so the sun can never shine on the bottom of the ditch no matter what direction it shines from.  In the equatorial regions of Luna, where daytime temperatures get higher than the melting point of sodium, an iron or aluminum pipe filled with sodium would make a good electrical conductor.

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 As an [[Electrical Conductors|electrical conductor]] a cable made of sodium would need to have about three times the cross sectional area to have the same electrical conductivity as a cable made of copper.  However, since copper is more than nine times as dense as sodium, the copper cable would be more than three times as heavy as the one made of sodium.  Sodium might have been used as an electrical conductor on Earth if it did not have some undesirable properties.  It is a fire hazard.  It reacts with water to give off hydrogen which can explode.  A chemical product of the reaction of sodium and water (lye) can cause chemical burns.  Although these things are very inconvenient on Earth, there is no fire hazard, no explosion hazard, and no possibility of chemical burns when an electrical conductor made of sodium remains out of doors on Luna.  One way of preventing such a cable from melting in the sun at 97.7 Celsius is to use it to conduct electricity in the polar area at the bottom of a zig zag ditch so the sun can never shine on the bottom of the ditch no matter what direction it shines from.  In the equatorial regions of Luna, where daytime temperatures get higher than the melting point of sodium, an iron or aluminum pipe filled with sodium would make a good electrical conductor.
 A considerable advantage of sodium over copper for use on Luna is the lack of available copper ore on Luna while there is some sodium which should be recoverable.  Aluminum is much more plentiful still, but difficulty in extracting it from lunar soil could lead to sodium being available first.  Calcium is also much more plentiful than sodium and is intermediate in conductivity between aluminum and sodium.
 [[Category:Paramagnetic Elements]]
 [[Category:Solids]]

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 As an [[Electrical Conductors|electrical conductor]] a cable made of sodium would need to have about three times the cross sectional area to have the same electrical conductivity as a cable made of copper.  However, since copper is more than nine times as dense as sodium, the copper cable would be more than three times as heavy as the one made of sodium.  Sodium might have been used as an electrical conductor on Earth if it did not have some undesirable properties.  It is a fire hazard.  It reacts with water to give off hydrogen which can explode.  A chemical product of the reaction of sodium and water (lye) can cause chemical burns.  Although these things are very inconvenient on Earth, there is no fire hazard, no explosion hazard, and no possibility of chemical burns when an electrical conductor made of sodium remains out of doors on Luna.  One way of preventing such a cable from melting in the sun at 97.7 Celsius is to use it to conduct electricity in the polar area at the bottom of a zig zag ditch so the sun can never shine on the bottom of the ditch no matter what direction it shines from.  In the equatorial regions of Luna, where daytime temperatures get higher than the melting point of sodium, an iron or aluminum pipe filled with sodium would make a good electrical conductor.
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 [[Category:Paramagnetic Elements]]

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 On the Moon NaK, a sodium potassium alloy, is one of the few substances that can be liquid in the ambient vacuum conditions for a considerable length of time.  At the eutectic concentrations of Na & K the alloy stays liquid from -12 to over 700 Celsius.  At the low temperature end the vapor pressure is low enough that the liquid takes a reasonable time to evaporate in the conditions Luna's outdoor environment.  This liquid can be alloyed with a powdered addition other metals at low temperature, perhaps making a [[Structural Engineering|Lunar Cement]].
-In the equatorial regions of Luna, where daytime temperatures get higher than the melting point of sodium, an iron or aluminum pipe filled with sodium would make a good [[Electrical Conductors|electrical conductor]].
+As an [[Electrical Conductors|electrical conductor]] a cable made of sodium would need to have about three times the cross sectional area to have the same electrical conductivity as a cable made of copper.  However, since copper is more than nine times as dense as sodium, the copper cable would be more than three times as heavy as the one made of sodium.  Sodium might have been used as an electrical conductor on Earth if it did not have some undesirable properties.  It is a fire hazard.  It reacts with water to give off hydrogen which can explode.  A chemical product of the reaction of sodium and water (lye) can cause chemical burns.  Although these things are very inconvenient on Earth, there is no fire hazard, no explosion hazard, and no possibility of chemical burns when an electrical conductor made of sodium remains out of doors on Luna.  One way of preventing such a cable from melting in the sun at 97.7 Celsius is to use it to conduct electricity in the polar area at the bottom of a zig zag ditch so the sun can never shine on the bottom of the ditch no matter what direction it shines from.  In the equatorial regions of Luna, where daytime temperatures get higher than the melting point of sodium, an iron or aluminum pipe filled with sodium would make a good electrical conductor.
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