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<p><b>New page</b></p><div>[[file:Atmosphere-composition-639x470.png|thumb|425px| Argon is the third common gas in Earths atmosphere. [http://apm.bplaced.net/w/images/9/93/Atmosphere-composition.svg SVG] <br> (variable atmospheric humidity omitted) ]]<br />
<br />
Argon is a noble gas that is highly abundant in Earths atmosphere. <br><br />
All other noble gasses ([[Helium]], [[Neon]], –, [[Krypton]], [[Xenon]]) are quite rare on Earth.<br />
<br />
As a noble gas it does not form bonds to other atoms when uncharged. <br><br />
It can only be enclosed or held by giving it a charge.<br />
<br />
Early (now outdated) concepts of [[molecular assemblers]] sometimes came with the proposition <br><br />
to fill the [[mechanosynthesis chamber]] with a noble gas like Helium, Neon, or Argon to inflate a graphene chamber or such. <br><br />
Especially with the (least reactive) lighter noble gasses this should not bother the process of [[piezochemical mechanosynthesis]].<br />
<br />
With atomic number 18 and atomic mass 40 <sup>40</sup>Ar (99.604%) <br><br />
it is quite a bit heavier than di-nitronen (atomic mass 14)*2 = 28 despite being monoatomic. <br><br />
It's thus not usable as a lifting gas.<br />
<br />
'''Stable isotopes:'''<br />
* <sup>36</sup>Ar (0.334%) – #protons = #neutrons<br />
* <sup>38</sup>Ar (0.063%)<br />
* '''<sup>40</sup>Ar (99.604%)'''<br />
<br />
Argon condenses and freezes a bit before nitrogen does:<br />
* Melting point 83.81 K<br />
* Boiling point 87.302 K <br />
<br />
== Related ==<br />
<br />
* [[Gem-gum balloon products]]<br />
* [[Chemical element]]<br />
* [[Periodic table of elements]]<br />
<br />
== External links ==<br />
<br />
* [https://en.wikipedia.org/wiki/Argon Argon]</div>Apm