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- Argon abstract "Argon is a chemical element with symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. Argon is the third most common gas in the Earth's atmosphere, at 0.93% (9,300 ppm), making it approximately 23.8 times as abundant as the next most common atmospheric gas, carbon dioxide (390 ppm), and more than 500 times as abundant as the next most common noble gas, neon (18 ppm). Nearly all of this argon is radiogenic argon-40 derived from the decay of potassium-40 in the Earth's crust. In the universe, argon-36 is by far the most common argon isotope, being the preferred argon isotope produced by stellar nucleosynthesis in supernovas.The name "argon" is derived from the Greek word αργον, neuter singular form of αργος meaning "lazy" or "inactive", as a reference to the fact that the element undergoes almost no chemical reactions. The complete octet (eight electrons) in the outer atomic shell makes argon stable and resistant to bonding with other elements. Its triple point temperature of 83.8058 K is a defining fixed point in the International Temperature Scale of 1990.Argon is produced industrially by the fractional distillation of liquid air. Argon is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily non-reactive substances become reactive; for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning. Argon gas also has uses in incandescent and fluorescent lighting, and other types of gas discharge tubes. Argon makes a distinctive blue-green gas laser.".
- Argon thumbnail Argon_ice_1.jpg?width=300.
- Argon wikiPageExternalLink its-90.html.
- Argon wikiPageExternalLink Why_Argon.htm.
- Argon wikiPageExternalLink 018.htm.
- Argon wikiPageExternalLink ar_iig.html.
- Argon wikiPageID "896".
- Argon wikiPageRevisionID "606490007".
- Argon b "y".
- Argon bSearch "Wikijunior:The Elements/Argon".
- Argon book "Argon".
- Argon book "Chemical elements".
- Argon book "Noble gases".
- Argon book "Period 3 elements".
- Argon commons "y".
- Argon date "June 2013".
- Argon hasPhotoCollection Argon.
- Argon portal "Chemistry".
- Argon reason "what are these sources and why do they have lower radioactivity??".
- Argon v "y".
- Argon vSearch "Argon atom".
- Argon wikt "y".
- Argon wiktSearch "argon".
- Argon subject Category:Argon.
- Argon subject Category:Chemical_elements.
- Argon subject Category:Industrial_gases.
- Argon subject Category:Noble_gases.
- Argon comment "Argon is a chemical element with symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. Argon is the third most common gas in the Earth's atmosphere, at 0.93% (9,300 ppm), making it approximately 23.8 times as abundant as the next most common atmospheric gas, carbon dioxide (390 ppm), and more than 500 times as abundant as the next most common noble gas, neon (18 ppm).".
- Argon label "Argon".
- Argon label "Argon".
- Argon label "Argon".
- Argon label "Argon".
- Argon label "Argon".
- Argon label "Argon".
- Argon label "Argón".
- Argon label "Árgon".
- Argon label "Аргон".
- Argon label "أرغون (عنصر)".
- Argon label "アルゴン".
- Argon label "氩".
- Argon sameAs Argon.
- Argon sameAs Argon.
- Argon sameAs Αργό.
- Argon sameAs Argón.
- Argon sameAs Argon.
- Argon sameAs Argon.
- Argon sameAs Argon.
- Argon sameAs Argon.
- Argon sameAs アルゴン.
- Argon sameAs 아르곤.
- Argon sameAs Argon.
- Argon sameAs Argon.
- Argon sameAs Árgon.
- Argon sameAs m.027r9df.
- Argon sameAs Q696.
- Argon sameAs Q696.
- Argon wasDerivedFrom Argon?oldid=606490007.
- Argon depiction Argon_ice_1.jpg.
- Argon isPrimaryTopicOf Argon.