வார்ப்புரு:தகவற்சட்டம் ஆர்கான்
{{Infobox element
 |name=ஆர்கான்
 |other name=argon	
 |pronounce={{IPAc-en|ˈ|ɑr|ɡ|ɒ|n}}
 |number=18
 |symbol=Ar
 |abundance=
 |abundance in earth's crust=
 |abundance in oceans=
 |abundance in solar system=
 |left=[[குளோரின்]]
 |right=[[பொட்டாசியம்]]
 |above=[[நியான்|Ne]]
 |below=[[கிரிப்டான்|Kr]]
 |category=noble gas
 |category comment=
 |group=18
 |period=3
 |block=p
 |appearance=colorless gas exhibiting a lilac/violet glow when placed in an electric field
 |image name=Argon discharge tube.jpg
 |electron configuration=&amp;#91;[[நியான்|Ne]]&amp;#93; 3s&lt;sup&gt;2&lt;/sup&gt; 3p&lt;sup&gt;6&lt;/sup&gt;
 |electrons per shell=2, 8, 8
 |phase=gas
 |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=&lt;ref name=b92/&gt;
 |critical point K=150.687
 |critical point MPa=4.863
 |critical point ref=&lt;ref name=b92&gt;{{RubberBible92nd|page=4.121}}&lt;/ref&gt;
 |heat fusion=1.18
 |heat fusion 2=
 |heat vaporization=6.53
 |heat capacity=20.85&lt;ref&gt;Shuen-Chen Hwang, Robert D. Lein, Daniel A. Morgan (2005). &quot;Noble Gases&quot;. Kirk Othmer Encyclopedia of Chemical Technology. Wiley. pp. 343–383. doi:10.1002/0471238961.0701190508230114.a01.&lt;/ref&gt;
 |vapor pressure 1=&amp;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=&lt;ref&gt;[http://www-d0.fnal.gov/hardware/cal/lvps_info/engineering/elementmagn.pdf Magnetic susceptibility of the elements and inorganic compounds], in {{RubberBible86th}}&lt;/ref&gt;
 |electrical resistivity=
 |electrical resistivity at 0=
 |electrical resistivity at 20=
 |thermal conductivity=17.72{{e|-3}}&amp;nbsp;
 |thermal conductivity 2=
 |thermal diffusivity=
 |thermal expansion=
 |thermal expansion at 25=
 |speed of sound=323
 |speed of sound comment=(gas, at&amp;nbsp;27&amp;nbsp;°C)
 |speed of sound rod at 20=
 |speed of sound rod at r.t.=
 |magnetic susceptibility=&amp;minus;19.6·10&lt;sup&gt;−6&lt;/sup&gt;
 |magnetic susceptibility ref= &lt;ref&gt;{{Cite book|title=CRC, Handbook of Chemistry and Physics|last=Weast|first=Robert|publisher=Chemical Rubber Company Publishing|year=1984|isbn=0-8493-0464-4|location=Boca Raton, Florida|pages=E110|quote=|via=}}&lt;/ref&gt;
 |Young's modulus=
 |Shear modulus=
 |Bulk modulus=
 |Poisson ratio=
 |Mohs hardness=
 |Vickers hardness=
 |Brinell hardness=
 |CAS number=7440-37-1
 |isotopes=
 {{infobox element/isotopes stable | mn=36 | sym=Ar
 |na=0.334% | n=18 |firstlinks=yes}}
 {{infobox element/isotopes decay | mn=37 | sym=Ar
 |na=[[செயற்கைக் கதிரியக்க ஓரிடத்தான்|செயற்கை]] | hl=35&amp;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=no}}
 {{infobox element/isotopes decay | mn=39 | sym=Ar
 |na=[[அரிய கதிரியக்க ஓரகத்தனிமம்|அரியது]] | hl=269&amp;nbsp;y
 |dm=[[பீட்டா சிதைவு|β&lt;sup&gt;−&lt;/sup&gt;]] | de=0.565 |link1=potassium-39 | pn=39 | ps=K}}
 {{Infobox element/isotopes stable | mn=40 | sym=Ar | na=99.604% | n=22 |firstlinks=no}}
 {{infobox element/isotopes decay | mn=41 | sym=Ar
 |na=செயற்கை | hl=109.34&amp;nbsp;min
 |dm=β&lt;sup&gt;−&lt;/sup&gt; | de=2.49 | link1=potassium-41 | pn=41 | ps=K}}
 {{infobox element/isotopes decay | mn=42 | sym=Ar
 |na=செயற்கை | hl=32.9&amp;nbsp;y
 |dm=β&lt;sup&gt;−&lt;/sup&gt; | de=0.600 | link1=potassium-42 | pn=42 | ps=K}}
 |isotopes comment={{chem|36|Ar}} and {{chem|38|Ar}} content may be as high as 2.07% and 4.3% respectively in natural samples. {{chem|40|Ar}} is the remainder in such cases, whose content may be as low as 93.6%.
 |discovery and first isolation by=[[சான் வில்லியம் ஸ்ட்ரட்]] and [[William Ramsay]]
 |discovery date=1894
 |QID=Q696
 }}&lt;!--
 
 --&gt;&lt;noinclude&gt;
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 * &lt;nowiki&gt;&lt;ref name=&quot;b92&quot; /&gt;&lt;/nowiki&gt; for the source edited by Haynes
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