text: # Ā (nguòng-só)
  Chăng-kō̤ Mìng-dĕ̤ng-ngṳ̄ Háng-cê gì bēng-buōng. / 參考閩東語漢字其版本。
  Ā (氬) sê siŏh cṳ̄ng hĭ-iū ké-tā̤ nguòng-só. Nguòng-cṳ̄ sê̤ṳ-só sê 18, huá-hŏk hù-hô̤ sê Ar.
title: Ā (nguòng-só)
wikitext: {{twinLAT|氬}}
  {{Infobox element
  |name=argon
  |enname=argon
  |laname=argon
  |number=18
  |symbol=Ar
  |left=[[Lṳ̆k (nguòng-só)|Lṳ̆k]]
  |right=[[Gák (gĭng-sṳ̆k)|Kali]]
  |above=[[Neon]]
  |below=[[Káik (nguòng-só)|Krypton]]
  |series=hĭ-iū ké-tā̤
  |series comment=
  |group=18
  |period=3
  |block=p
  |series color=
  |appearance=colorless gas exhibiting a lilac/violet glow when placed in a high voltage electric field
  |image name=Argon discharge tube.jpg
  |image size=
  |image alt=Tŭng-diêng gì Argon
  |image name 2=Argon Spectrum.png
  |image name 2 comment=Spectral lines of argon
  |atomic mass=39.948
  |atomic mass ref=<ref name="IUPAC">[http://www.ciaaw.org/atomic-weights.htm Standard Atomic Weights 2013]. [[Commission on Isotopic Abundances and Atomic Weights]]</ref>
  |atomic mass 2=1
  |atomic mass comment=
  |electron configuration=&#91;[[neon|Ne]]&#93; 3s<sup>2</sup> 3p<sup>6</sup>
  |electrons per shell=2, 8, 8
  |color=
  |phase=ké-tā̤
  |density gplstp=1.784
  |density gpcm3nrt=
  |density gpcm3nrt 2=
  |density gpcm3mp=
  |density gpcm3bp=1.3954
  |melting point K=83.81
  |melting point C=−189.34
  |melting point F=−308.81
  |boiling point K=87.302
  |boiling point C=−185.848
  |boiling point F=−302.526
  |triple point K=83.8058
  |triple point kPa=68.89
  |triple point ref=<ref name=b92/>
  |critical point K=150.687
  |critical point MPa=4.863
  |critical point ref=<ref name=b92>{{RubberBible92nd|page=4.121}}</ref>
  |heat fusion=1.18
  |heat fusion 2=
  |heat vaporization=6.53
  |heat capacity=20.85<ref>Shuen-Chen Hwang, Robert D. Lein, Daniel A. Morgan (2005). "Noble Gases". Kirk Othmer Encyclopedia of Chemical Technology. Wiley. pp. 343–383. doi:10.1002/0471238961.0701190508230114.a01.</ref>
  |vapor pressure 1=&nbsp;
  |vapor pressure 10=47
  |vapor pressure 100=53
  |vapor pressure 1 k=61
  |vapor pressure 10 k=71
  |vapor pressure 100 k=87
  |vapor pressure comment=
  |crystal structure=face-centered cubic
  | oxidation states='''0'''
  |oxidation states comment=
  |electronegativity=no data
  |number of ionization energies=4
  |ionization energy 1=1520.6
  |ionization energy 2=2665.8
  |ionization energy 3=3931
  |atomic radius=
  |atomic radius calculated=
  |covalent radius=106±10
  |Van der Waals radius=188
  |magnetic ordering=[[diamagnetic]]
  |magnetic ordering ref=<ref>[http://www-d0.fnal.gov/hardware/cal/lvps_info/engineering/elementmagn.pdf Magnetic susceptibility of the elements and inorganic compounds], in {{RubberBible86th}}</ref>
  |electrical resistivity=
  |electrical resistivity at 0=
  |electrical resistivity at 20=
  |thermal conductivity=17.72{{e|-3}}</sup>&nbsp;
  |thermal conductivity 2=
  |thermal diffusivity=
  |thermal expansion=
  |thermal expansion at 25=
  |speed of sound=323
  |speed of sound comment=(gas, at&nbsp;27&nbsp;°C)
  |speed of sound rod at 20=
  |speed of sound rod at r.t.=
  |Young's modulus=
  |Shear modulus=
  |Bulk modulus=
  |Poisson ratio=
  |Mohs hardness=
  |Vickers hardness=
  |Brinell hardness=
  |CAS number=7440-37-1
  |isotopes=
  {{infobox element/isotopes decay | mn=36 | sym=Ar
   | na=0.337% | hl=–
   | dm= ([[double beta decay|β<sup>+</sup>β<sup>+</sup>]]) | de=0.4335 | link1=sulfur-36 | pn=36 | ps=S}}
  {{infobox element/isotopes decay | mn=37 | sym=Ar
   | na=[[synthetic radioisotope|syn]] | hl=35&nbsp;d
   | dm=[[electron capture|ε]] | de=0.813 | link1=chlorine-37 | pn=37 | ps=Cl}}
  {{Infobox element/isotopes stable | mn=38 | sym=Ar | na=0.063% | n=20 |firstlinks=yes}}
  {{infobox element/isotopes decay | mn=39 | sym=Ar
   | na=[[trace radioisotope|trace]] | hl=[[1 E9 s|269&nbsp;y]]
   | dm=[[beta emission|β<sup>−</sup>]] | de=0.565 |link1=potassium-39 | pn=39 | ps=K}}
  {{Infobox element/isotopes stable | mn=40 | sym=Ar | na=99.600% | n=22 |firstlinks=no}}
  {{infobox element/isotopes decay | mn=41 | sym=Ar
   | na=syn | hl=109.34&nbsp;min
   | dm=β<sup>−</sup> | de=2.49 | link1=potassium-41 | pn=41 | ps=K}}
  {{infobox element/isotopes decay | mn=42 | sym=Ar
   | na=syn | hl=32.9&nbsp;y
   | dm=β<sup>−</sup> | de=0.600 | link1=potassium-42 | pn=42 | ps=K}}
  |isotopes comment=Decay modes in parentheses are predicted, but have not yet been observed
  |discovery and first isolation by=[[Lord Rayleigh]] and [[William Ramsay]]
  |discovery date=1894
  }}
  '''Ā''' (氬) sê siŏh cṳ̄ng [[hĭ-iū ké-tā̤]] [[huá-hŏk nguòng-só|nguòng-só]]. [[Nguòng-cṳ̄ sê̤ṳ-só]] sê 18, huá-hŏk hù-hô̤ sê Ar.
  
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