oxygen
Let an agent identify oxygen and its properties, relay its biological, atmospheric and industrial roles, relay medical oxygen and safety information from authoritative sources, and distinguish the element from its allotropes and compounds.
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 identify oxygen and its properties, relay its biological, atmospheric and industrial roles, relay medical oxygen and safety information from authoritative sources, and distinguish the element from its allotropes and compounds.
A chemical element with symbol O and atomic number 8, a highly reactive non-metal and oxidising agent that forms diatomic oxygen gas making up about 21 percent of the atmosphere, the ozone allotrope, and compounds with most elements including water and oxides; oxygen is essential to respiration in most organisms, is produced by photosynthesis and by air separation for industry and medicine, and has three stable isotopes, with dark oxygen a reported deep-sea production process under study.
What it is for: Respiration, combustion, industry and medicine.
It can be relay properties and isotopes; explain biological and atmospheric roles; relay industrial and medical uses; relay safety information.
Distinguishing features
Strong oxidiser
Essential to aerobic life
Produced by photosynthesis
Most abundant element in the crust
What it looks like
A colourless, odourless gas; pale blue as a liquid.
Physical character
atomic number: 8 Z
standard atomic weight: 15.999 u
boiling point: -183 degrees C
share of atmosphere: about 20.9 percent - by volume
How it is recognised
Element 8, symbol O, diatomic gas
21 percent of air
Ozone is an allotrope; oxides and water are compounds
Related models
is a kind of - group 16
is a kind of - in registry terms
is produced by - in the biosphere
is consumed by - in aerobic life
In practice
Families and kinds
dioxygen gas and liquid oxygen
ozone
isotopes oxygen-16, 17 and 18 stable, with radioactive isotopes from oxygen-11 to oxygen-28
medical and industrial oxygen
dark oxygen as a reported deep-sea process
Identifiers
symbol O
CAS 7782-44-7
Standards and regulation
Medical oxygen pharmacopoeia standards
Compressed and cryogenic gas safety standards
Oxygen-enriched atmosphere fire rules
Ozone and air quality regulation
Failure modes and hazards
Fire and explosion in oxygen-enriched atmospheres
Oxygen toxicity at high partial pressures
Hypoxia when oxygen is depleted
Agents giving personal medical advice on oxygen therapy
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.oxygen
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Identify What oxygen is.
Identity.
Properties
Properties and allotropes.
Properties
Properties.
- What are the properties of oxygen, and how do dioxygen and ozone differ? definition
- Is the question about the element, an allotrope or a compound? boundary
Isotopes
Isotopes.
Isotopes
Isotopes.
- Which isotopes exist, and how are oxygen-18 ratios used in climate science? definition
- Which entry fits the specific isotope? action
Life Biology and atmosphere.
Science.
Biology
Respiration and photosynthesis.
Biology
Biology.
- How do organisms produce and use oxygen? provenance
- Which entry fits cellular respiration? action
Atmosphere
Atmosphere and history.
Atmosphere
Atmosphere.
- How did atmospheric oxygen arise, and what is known about dark oxygen production in the deep sea, with findings attributed? provenance
- Which references are standard? provenance
Use Industry and medicine.
Application.
Industry
Industrial uses.
Industry
Industry.
- How is oxygen produced and used in steelmaking, chemicals and rocketry? provenance
- Which entry fits air separation? action
Medical
Medical oxygen.
Medical
Medical.
- How is medical oxygen regulated and used, in general terms? provenance
- Is the user asking about their own oxygen therapy, which needs a clinician? boundary
Safety Safety and history.
Regulation.
Hazards
Hazards.
Hazards
Hazards.
- What fire, toxicity and hypoxia hazards involve oxygen, and what rules apply? provenance
- Which entry fits oxygen safety? action
History
History.
History
History.
- How was oxygen discovered by Scheele, Priestley and Lavoisier, and how did it end the phlogiston theory? provenance
- Which sources are cited? provenance
What the second pass must settle
- Should ozone and medical oxygen be separate primary entries?
- How should safety standards be linked?
- The registry entry has merged aliases naming isotopes and a research topic; should they be split off?