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アルゴン

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Also known as Ar, element 18, 18Ar

原子番号18の元素

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.

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

Article · 日本語

アルゴン（英: argon）は原子番号18番の元素である。元素記号は Ar。原子量は39.95。第18族元素（貴ガス）、第3周期元素の一つ。

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