Difference between revisions of "Sodium"
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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 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. 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 other metals at low temperature, perhaps making a [[Structural Engineering|Lunar Cement]]. |
Revision as of 12:35, 26 October 2012
| Sodium | |
|---|---|
| Na | |
| In situ availability: | trace |
| Necessity: | essential |
| Atomic number: | 11 |
| Atomic mass: | 22.98977 |
| group: | 1 |
| period: | 3 |
| normal phase: | Solid |
| series: | Alkali metals |
| density: | 0.968 g/cm3 |
| melting point: | 370.87K, 97.72°C, 207.9°F |
| boiling point: | 1156K, 883°C, 1621°F |
| N/A ← Li → Be | |
| Ne ← Na → Mg | |
| N/A ← K → Ca | |
| Atomic radius (pm): | 180 |
| Bohr radius (pm): | 190 |
| Covalent radius (pm): | 154 |
| Van der Waals radius (pm): | 227 |
| ionic radius (pm): | (+1) 102 |
| 1st ion potential (eV): | 5.14 |
| Electron Configuration | |
| 1s2 2s2 2p6 3s1 | |
| Electrons Per Shell | |
| 2, 8, 1 | |
| Electronegativity: | 0.93 |
| Electron Affinity: | 0.55 |
| Oxidation states: | 1 |
| Magnetism: | Paramagnetic |
| Crystal structure: | Body centered cubic |
Sodium is a Alkali metal in group 1.
It has a Body centered cubic crystalline structure.
This element has a stable isotope of 23
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 Lunar Cement.
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