argon

Also known as Ar, element 18, 18Ar

grundämne

OverviewAI-generated

Argon is a chemical element with the symbol Ar and atomic number 18. Its standard molar entropy is 154.8, and it has a mass of 39.95. The element’s electron configuration is listed as 1s² 2s² 2p⁶ 3s² 3p⁶, or [Ne] 3s² 3p⁶. It was discovered in 1894.

The substance has a melting point of -189.34 and a boiling point of -185.85. Its speed of sound is 813, and its dynamic viscosity is 22.7. Argon is represented by the Unicode character 氬. It has zero hydrogen bond donors and acceptors, with a charge of 0.

Synthesized by Vinony from 27 facts across 4 sources: Wikidata, PubChem, PubMed, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.

In the Vinony graph

Within Vinony's link graph, argon is referenced by 1,178 other articles, and connects out to block, incandescent light bulb and isotope of argon.

Vinony files it under Argon, Chemical elements and E-number additives.

Its subject is documented across 165 Wikipedia language editions.

Chemical data

Formula: Ar
Molecular weight: 39.9 g/mol
IUPAC name: argon
SMILES: [Ar]
InChIKey: XKRFYHLGVUSROY-UHFFFAOYSA-N
Polar surface area: 0 Å²
H-bond donors: 0
H-bond acceptors: 0
Formal charge: 0

via PubChem

Research

21,127 papers

Argon neuroprotection in ischemic stroke and its underlying mechanism.ReviewBrain research bulletin · 2024Bao L, Liu Y, Jia Q et al.DOI: 10.1016/j.brainresbull.2024.110964
Argon pharmacokinetics: a solubility measurement technique.Medical gas research · 2023Lemaire J, Heninger M, Louarn E et al.DOI: 10.4103/2045-9912.351106
Xenon and Argon as Neuroprotective Treatments for Perinatal Hypoxic-Ischemic Brain Injury: A Preclinical Systematic Review and Meta-Analysis.Anesthesia and analgesia · 2025Barros M, Liang M, Iannucci N et al.DOI: 10.1213/ANE.0000000000007223
Argon neuroprotection.Critical care (London, England) · 2010Sanders RD, Ma D, Maze MDOI: 10.1186/cc8847
Argon: The Future Organ Protectant?Annals of cardiac anaesthesia · 2019Nair SGDOI: 10.4103/aca.ACA_180_18
Argon: systematic review on neuro- and organoprotective properties of an "inert" gas.International journal of molecular sciences · 2014Höllig A, Schug A, Fahlenkamp AV et al.DOI: 10.3390/ijms151018175
The Molecular Pathway of Argon-Mediated Neuroprotection.ReviewInternational journal of molecular sciences · 2016Ulbrich F, Goebel UDOI: 10.3390/ijms17111816
Argon-stimulated nitric oxide production and its function in alfalfa cadmium tolerance.Environmental pollution (Barking, Essex : 1987) · 2023Wang J, Liu B, Jin Z et al.DOI: 10.1016/j.envpol.2023.122009

via PubMed

Wikidata facts

Instance of: atmophile element
Subclass of: noble gases
Part of: noble gases
Named after: laziness
Mass: 39.95
Image: ArTube.jpg
Has use: food additive

Show 17 more facts

element symbol: Ar
Commons category: Argon
topic's main category: Category:Argon
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4
atomic number: 18
speed of sound: 813
discoverer or inventor: John Strutt, 3rd Baron Rayleigh
Commons gallery: Argon
canonical SMILES: [Ar]
chemical formula: Ar
time of discovery or invention: 1894-00-00
standard molar entropy: 154.8
dynamic viscosity: 22.7
Unicode character: 氬
electron configuration: [Ne] 3s² 3p⁶
melting point: -189.34
boiling point: -185.85

Sources (6)

via Wikidata · CC0

Article · Svenska

Argon är ett icke-metalliskt grundämne som har atomnummer 18 och kemiskt tecken Ar. Argon är den vanligaste ädelgasen och den finns i jordens atmosfär i en halt av cirka 0,93 %. Argon används ibland som förpackningsgas i livsmedel och har E-nummer E 938.

Abstract from DBpedia / Wikipedia · CC BY-SA