nitrogen
Let an agent identify nitrogen and its properties, relay its atmospheric, biological and industrial roles, explain the nitrogen cycle and environmental issues with sources, and distinguish the element from its compounds and from soil and dissolved nitrogen pools.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Identify What nitrogen is.
Properties
Properties.
Properties
Properties.
- What are the physical and chemical properties of nitrogen? definition
- Is the question about the element, a compound or an environmental nitrogen pool? boundary
Isotopes
Isotopes.
Isotopes
Isotopes.
- Which isotopes exist, and how is nitrogen-15 used as a tracer? definition
- Which entry fits the specific isotope? action
Cycle The nitrogen cycle.
Cycle
Cycle.
Cycle
Cycle.
- How does nitrogen move through fixation, nitrification, assimilation and denitrification? provenance
- Which entry fits nitrogen cycle? action
Pools
Soil and water pools.
Pools
Pools.
- What are soil nitrogen, soil organic nitrogen and dissolved organic nitrogen, and why do they matter? provenance
- Which references are standard? provenance
Industry Uses and safety.
Uses
Uses.
Uses
Uses.
- How is nitrogen produced and used, from fertilisers to cryogenics and inert atmospheres? provenance
- Which entry fits the Haber process? action
Safety
Safety.
Safety
Safety.
- What hazards do nitrogen gas and liquid present, and what rules apply? provenance
- Is the user asking about a confined space or exposure, which needs safety professionals? boundary
Environment Environment and history.
Pollution
Nitrogen pollution.
Pollution
Pollution.
- How do nitrogen compounds cause eutrophication and air pollution, and how are they regulated, with sources? provenance
- Which sources are cited? provenance
History
History.
History
History.
- How was nitrogen discovered, and how did the Haber-Bosch process change agriculture? provenance
- Which entry fits the history of chemistry? action
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.MAT
- Other names and narrower kinds
- allotrope of nitrogen, dissolved organic nitrogen, soil nitrogen, nitrogen-14, soil organic nitrogen, nitrogen-22, nitrogen-19, nitrogen-20, nitrogen-18, nitrogen-17, nitrogen-16, nitrogen-25
What it is Filled
A chemical element with symbol N and atomic number 7, a colourless, odourless diatomic gas making up about 78 percent of the atmosphere, essential to life in proteins and nucleic acids, and cycled through soils, water and organisms in organic and inorganic forms; nitrogen is produced industrially by air separation, converted to ammonia for fertilisers, and its compounds are central to agriculture, explosives and pollution, with two stable isotopes, nitrogen-14 and nitrogen-15.
Why it exists Filled
Let an agent identify nitrogen and its properties, relay its atmospheric, biological and industrial roles, explain the nitrogen cycle and environmental issues with sources, and distinguish the element from its compounds and from soil and dissolved nitrogen pools.
Distinguishing features Filled
- Triple-bonded diatomic gas
- Atmospheric abundance
- Biological essential
- Fixed industrially by the Haber process
What robots and AI may and may not do Filled
Must not
- Send people into a confined space where nitrogen may have displaced oxygen without testing and a permit.
- Handle liquid nitrogen without the protective equipment and venting the work requires.
- Seal liquid nitrogen in a closed container.
- Help use nitrogen gas to harm a person or an animal.
Only with a human decision
- Permitting entry into a confined space that has been inerted with nitrogen.
- Releasing nitrogen-rich effluent or fertiliser near water bodies.
May
- Describe nitrogen's properties, uses and its cycle in nature.
- Monitor oxygen levels where nitrogen is used and raise an alarm when they fall.
- Report fertiliser and nitrogen oxide pollution data from authorized sources.
Moral aspects Filled
- Nitrogen asphyxia gives no warning; workers and rescuers die in confined spaces each year.
- Synthetic nitrogen fertiliser feeds much of humanity and also pollutes rivers and coasts.
Who is affected
- Workers in confined spaces
- People handling cryogenic liquids
- Communities near polluted waters
Owners Filled
Steward
Nobody owns the element; suppliers and users answer for the gas and liquid they hold under workplace safety rules.
Links to other meta-models Filled
parent
- Q19753344 - registry parent class
related
- diatomic nonmetal - in registry terms
- pnictogen - group 15
- nitrogen cycle - through the biosphere
- Haber process - into ammonia
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.nitrogen
- Wikidata: Q627 (https://www.wikidata.org/wiki/Q627)
- symbol: N
- CAS: 7727-37-9
Direct properties required Filled
- atomic number: 7 Z
- standard atomic weight: 14.007 u
- boiling point: -195.8 degrees C
- share of atmosphere: about 78 percent - by volume
Recognition required Filled
- Element 7, symbol N, diatomic gas
- 78 percent of air
- Nitrates, ammonia and soil nitrogen are compounds or pools, not the element
- A colourless, odourless gas; a colourless liquid when cryogenically cooled.
Capabilities and actions required Filled
- relay properties and isotopes
- explain the nitrogen cycle
- relay industrial uses and safety
- distinguish element from compounds and pools
Hazards and failure modes required Filled
- Asphyxiation in confined spaces
- Cold burns from liquid nitrogen
- Eutrophication and air pollution from nitrogen compounds
- Confusing element with compounds
Standards and interfaces required Filled
- Cryogenic and compressed gas safety standards
- Fertiliser and nitrate regulations such as the EU Nitrates Directive
- Air quality rules on nitrogen oxides
- Chemical safety data sheets
Context of use required Filled
- Inert atmosphere, fertiliser production, cryogenics and chemical industry.
- nitrogen gas and liquid nitrogen
- isotopes nitrogen-14 and nitrogen-15, with radioactive isotopes from nitrogen-10 to nitrogen-25
- nitrogen pools: soil nitrogen, soil organic nitrogen, dissolved organic nitrogen
- nitrogen compounds such as ammonia, nitrates and nitrogen oxides
- allotropes and polymeric forms under extreme conditions
Sources Filled
- Wikidata item Q627: nitrogen - identity and sense of the item
- Wikipedia: Nitrogen - general description of the item
Open questions
- Should the nitrogen cycle and nitrogen pollution be separate primary entries?
- How should environmental data be linked?
- The registry entry has merged aliases naming isotopes and environmental pools; should they be split off?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q627/spec.json