Argon - Wikiparency

# Argon ## 🧊 Argon · 3D (three.js) <iframe src="https://wikitube-elements.netlify.app/?el=Ar&embed=1" width="100%" height="620" frameborder="0" style="border:0;border-radius:12px;overflow:hidden" allowfullscreen loading="lazy" title="The Elements 3D microsim - Argon"></iframe> *Argon in the live three.js Elements explorer — drag to orbit the atom, click any tile to compare, slide the temperature.* · [▶ open full](https://wikitube-elements.netlify.app/?el=Ar)  !Argon plate.svg *Plate 18 of 118 - animated Bohr shells, stylized per Madelung filling; engraving style per house Arcanity kit.* ## Microsim To Do *Claimable rows, house pattern. Real Wikipedia articles only.* - [[Noble_gas|Noble gas]] - noble gases and group 18 chemical inertness - Potassium-argon dating - radiometric dating and geochronology - Arc welding - argon atmosphere in metalworking processes - Plasma display - argon plasma and display technology - [[Cryogenics|Cryogenics]] - argon-cooled systems and low-temperature physics ## Links (Wikipedia order)  `AIM-9_Sidewinder` · `Abiogenesis` · `Acetaldehyde` · `Acetamide` · `Acetic_acid` · `Acetic_acid_bacteria` · `Acetone` · `Acetonitrile` · `Acetylene` · `Acrolein` · `Acrylonitrile` · [[Actinium]] · `Aerosol` · `Air-free_technique` · `Air_separation` · `Alaska` · `Alkali` · `Alkali_metal` · `Alkaline_earth_metal` · [[Alpha_particle]] · `Alpha_process` · [[Aluminium]] · `Aluminium(II)_oxide` · `Aluminium_monochloride` · `Aluminium_monofluoride` · [[Americium]] · `Amino_radical` · `Aminoacetonitrile` · `Ammonia` · `Ammonium` · `Ancient_Greek` · `Anthracene` · [[Antimony]] · `ArDM` · `Aragon` · `Arc_welding` 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Infobox grounded in [Wikipedia: List of chemical elements](https://en.wikipedia.org/wiki/List_of_chemical_elements), fetched 2026-07-08. Full article: [Wikipedia: Argon](https://en.wikipedia.org/wiki/Argon).  ## Key facts (infobox) | | | |---|---| | Symbol - Z | Ar - 18 | | Group - Period - Block | 18 - 3 - p-block | | Atomic weight (Da) | 39.95 | | Density (g/cm3) | 0.001784 | | Melting - Boiling (K) | 83.80 - 87.30 | | Electronegativity (Pauling) | - | | Crustal abundance (mg/kg) | 3.5 | | Origin | primordial | | Phase (STP) | gas | | Name origin | Greek argos, 'idle' (it is inert) | *Bracketed weights are the mass number of the most stable isotope; values in parentheses are predictions (per the source table).* ## Story Argon was discovered in 1894 by Scottish chemist William Ramsay and English physicist John Strutt (Lord Rayleigh), who isolated it by systematically removing known gases from air, leaving a residue they could not identify. The discovery was unexpected—most scientists believed the periodic table contained no undiscovered elements below atomic number 90 [model-prior - verify]. Ramsay named it *argon* from the Greek *argos*, meaning "idle" or "inert," capturing the element's complete reluctance to participate in chemical reactions. The discovery announced the existence of an entire new group of elements—the noble gases. Argon is a monatomic noble gas comprising approximately 0.93% of Earth's atmosphere, making it the third most abundant atmospheric gas after nitrogen and oxygen. As a completely inert element with a filled outer electron shell, argon participates in virtually no chemical reactions under normal conditions [model-prior - verify]. This extreme inertness makes argon invaluable as a protective atmosphere in welding, metalworking, and semiconductor manufacturing, where reactive elements must be excluded. Argon is also used in plasma displays, high-speed photography (argon strobe lamps), and cryogenics, where its low boiling point (87 K) enables rapid cooling [model-prior - verify]. Argon-40, produced by potassium-40 decay, is used in potassium-argon dating of rocks, a fundamental technique in geochronology. In this corpus, argon represents the **noble gas principle**—elements that have achieved complete stability and refuse to participate in the dynamic world of reactive chemistry. Paradoxically, this inertness is what makes argon valuable to industry and science. ## Corpus connections - R.E.A.C.T.I.O.N. - the Chemistry hub - Centers of Excellence Portal - [[Technetium|Technetium - the element made before found]] - the canon's patron - and Technitium, the School - External: [Noble_gas - en.wikipedia.org](https://en.wikipedia.org/wiki/Noble_gas) for inert elements - External: [Potassium-argon_dating - en.wikipedia.org](https://en.wikipedia.org/wiki/Potassium%E2%80%93argon_dating) for geochronology - SOLAR SYSTEM MINING SURVEYS - argon-40 in lunar and meteoritic samples ## Vocational-Technical Semiotics The element speaks the canon's shared signs: the periodic table cell (Ar, group 18, period 3), isotope notation, and hazard pictograms ghs where handling demands it. ## Sources Infobox: [en.wikipedia.org/wiki/List_of_chemical_elements](https://en.wikipedia.org/wiki/List_of_chemical_elements) (fetched 2026-07-08); etymology per the same table's notes. Story sources to be added at enrichment.  ## From the Real GENERATIVE library > Argon is a chemical element; it has symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas.[9] Argon is the third most abundant gas in Earth's atmosphere, at 0.934% (9340 ppmv). ([Wikipedia](https://en.wikipedia.org/wiki/Argon))  ## Navigation - Canon: Elements Canon index - neighbors by Z: [[Chlorine|Chlorine (17)]] - [[Potassium|Potassium (19)]] - R.E.A.C.T.I.O.N. - Centers of Excellence ## Wikipedia : Wikitube **Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Argon) : [Wikitube](https://en.wikitube.io/wiki/Argon) ## Previous hub tags Tree parents: [[Helium]] · [[Hydrogen]] · [[Oxygen]]. Legacy hubs: none. --- *Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*