argon
Let an agent explain argon as an element and its properties, relay isotopes, occurrence and production from chemistry references, describe uses and hazards, and distinguish argon from other noble gases.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain argon as an element and its properties, relay isotopes, occurrence and production from chemistry references, describe uses and hazards, and distinguish argon from other noble gases.
A chemical element with symbol Ar and atomic number 18, a colourless, odourless noble gas making up about 0.93 percent of the atmosphere, the most abundant noble gas on Earth, produced by fractional distillation of liquid air and used as an inert shielding gas in welding, in incandescent and fluorescent lamps, in double glazing and in laboratory and preservation atmospheres, with stable isotopes argon-36, 38 and 40 and radioactive isotopes such as argon-39 and argon-41 through the short-lived argon-43 to argon-47 known from experiments.
What it is for: Inert atmospheres, lighting and insulation.
It can be explain properties; relay isotopes and occurrence; describe uses and hazards; distinguish from other noble gases.
Distinguishing features
Inert
Abundant noble gas
From air distillation
Argon-40 from potassium decay
What it looks like
An invisible gas that glows violet-blue in a discharge.
Physical character
atomic number: 18 Z
standard atomic weight: 39.95 u
atmospheric share: about 0.934 percent - by volume
boiling point: -185.8 C
stable isotopes: 36, 38, 40 mass numbers
How it is recognised
Colourless noble gas from air
Argon gas, isotopes argon-36, 38, 40 stable, argon-39 and 41 and heavier radioactive isotopes
Helium and neon are lighter noble gases; nitrogen is not a noble gas
Related models
is a kind of - in registry terms
is produced by - of liquid air
is used in - as shielding gas
is used in - through argon-40
In practice
Families and kinds
argon gas and liquid argon
stable isotopes
argon-39 and argon-41 radioactive isotopes
short-lived isotopes argon-43 to argon-47 and lighter ones
argon compounds such as argon fluorohydride under special conditions
Identifiers
CAS 7440-37-1 argon
symbol Ar element
Standards and regulation
Industrial gas safety standards
Confined space and asphyxiation rules
Welding gas specifications
Failure modes and hazards
Asphyxiation in confined spaces
Confusing argon with other inert gases
Cold burns from liquid argon
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.argon
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What argon is.
Science.
Properties
Properties.
Properties
Properties.
- What are the physical and chemical properties of argon, and why is it inert? definition
- Is the question about the element, an isotope or another noble gas? boundary
Isotopes
Isotopes.
Isotopes
Isotopes.
- What isotopes of argon exist, and why is argon-40 dominant on Earth? measurement
- Which entry fits the specific isotope? action
Use Uses.
Application.
Industry
Industry.
Industry
Industry.
- How is argon used in welding, lighting, glazing and metallurgy? provenance
- Which references are standard? provenance
Science
Science.
Science
Science.
- How is argon used in dating, detectors, lasers and preservation? provenance
- Which sources are cited? provenance
Produce Occurrence and production.
Practice.
Occurrence
Occurrence.
Occurrence
Occurrence.
- Where does argon occur in the atmosphere and in other planets? provenance
- Which entry fits atmosphere of Earth? action
Production
Production.
Production
Production.
- How is argon separated from air and supplied? provenance
- Which entry fits air separation? action
Context Safety and history.
Context.
Safety
Safety.
Safety
Safety.
- What are the asphyxiation and cold hazards of argon, and how are they managed? provenance
- Which entry fits inert gas asphyxiation? action
History
History.
History
History.
- How was argon discovered by Rayleigh and Ramsay in 1894? provenance
- Which entry fits the discovery of the noble gases? action
What the second pass must settle
- Should isotopes of argon be a separate entry?
- How should chemistry references be linked?
- The registry entry has merged aliases naming individual isotopes; should they be split off?