nonmetal
Let an agent explain nonmetals, relay properties, periodic table position and classification debates from chemistry sources with differing schemes attributed, describe the named subgroups including metalloids, and distinguish nonmetals from metals, metalloids, noble gases as a subgroup and non-metallic materials.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Understand What a nonmetal is.
Definition
Definition.
Definition
Definition.
- What is a nonmetal, and how does it differ from metals, metalloids, noble gases as a subgroup and non-metallic materials? definition
- Is the question about school chemistry, a specific element or classification? boundary
Subgroups
Named subgroups.
Subgroups
Subgroups.
- What are metalloids, diatomic nonmetals and polyatomic nonmetals? definition
- Which entry fits the specific subgroup? action
Chemistry Properties.
Properties
Properties.
Properties
Properties.
- What physical and chemical properties characterise nonmetals? provenance
- Which references are standard? provenance
Bonding
Bonding.
Bonding
Bonding.
- How do nonmetals form covalent and ionic bonds? provenance
- Which sources are cited? provenance
Classification Classification debates.
Boundary
Metal-nonmetal boundary.
Boundary
Boundary.
- Why do sources disagree on which elements are nonmetals or metalloids, with schemes attributed? provenance
- Which entry fits metalloid? action
Periodic table
Periodic table colours.
Periodic table
Periodic table.
- How do different periodic tables colour nonmetal categories? provenance
- Is the presentation neutral and attributed? boundary
Context Life and safety.
Life
Elements of life.
Life
Life.
- Why do nonmetals such as carbon, oxygen and nitrogen dominate living matter? provenance
- Which entry fits CHON? action
Hazards
Hazardous nonmetals.
Hazards
Hazards.
- Which nonmetals are especially hazardous, at reference level? provenance
- Which entry fits white phosphorus? 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
- metalloid, polyatomic nonmetal, diatomic nonmetal
What it is Filled
A chemical element that generally lacks metallic properties, being a poor conductor of heat and electricity and tending to gain electrons, commonly including hydrogen, carbon, nitrogen, oxygen, phosphorus, sulfur, selenium, the halogens and the noble gases, and grouped by some sources as diatomic nonmetals such as hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine and iodine and polyatomic nonmetals such as carbon, phosphorus, sulfur and selenium; metalloids such as boron, silicon, arsenic and tellurium have intermediate properties and are classified variously, since IUPAC does not fix a single boundary.
Why it exists Filled
Let an agent explain nonmetals, relay properties, periodic table position and classification debates from chemistry sources with differing schemes attributed, describe the named subgroups including metalloids, and distinguish nonmetals from metals, metalloids, noble gases as a subgroup and non-metallic materials.
Distinguishing features Filled
- Poor conductors
- High electronegativity
- Form covalent compounds
- Boundary debated
What robots and AI may and may not do Filled
Must not
- Present one classification scheme as the only correct one.
- Give handling or preparation procedures for highly reactive nonmetals such as fluorine or white phosphorus outside a supervised setting.
- Assist in using reactive or toxic nonmetals to harm people.
- Downplay the fire and toxicity hazards of elemental nonmetals.
Only with a human decision
- Handling, storing or disposing of reactive elemental nonmetals.
May
- Explain which elements are usually classed as nonmetals and why classifications differ.
- Distinguish nonmetals from metalloids, noting borderline elements such as selenium.
Moral aspects Filled
- Some nonmetals, such as white phosphorus, have been used as weapons against civilians.
Who is affected
- Students and teachers
- Laboratory workers
- Civilians near misuse
Owners Filled
Steward
Nobody owns the category; chemical bodies maintain the periodic table and nomenclature.
Links to other meta-models Filled
parent
- Q11344 - registry parent class
- Q428830 - registry parent class
related
- chemical element - in registry terms
- halogen
- noble gas
- metal
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.nonmetal
- Wikidata: Q19600 (https://www.wikidata.org/wiki/Q19600)
Direct properties required Filled
- commonly counted nonmetals: about 17-23 count - depends on scheme
- location: upper right of the periodic table, plus hydrogen note
- IUPAC position: no formal fixed definition of nonmetal boundary note
Recognition required Filled
- Element lacking metallic character
- Metalloid, polyatomic nonmetal, diatomic nonmetal, halogen, noble gas
- Metals conduct and are malleable; metalloids are intermediate; noble gases are one nonmetal group; non-metallic materials are compounds
- Varied: colourless gases, black or yellow solids, and red-brown liquid bromine.
Capabilities and actions required Filled
- explain properties
- relay periodic table position
- describe named subgroups
- relay classification debates
Hazards and failure modes required Filled
- Presenting one classification as universal
- Confusing metalloids with nonmetals
- Hazards of reactive elements such as fluorine and white phosphorus
Standards and interfaces required Filled
- IUPAC periodic table recommendations
Context of use required Filled
- Not applicable; a class of elements.
- reactive nonmetals
- halogens
- noble gases
- diatomic and polyatomic nonmetals
- metalloids as borderline
Sources Filled
- Wikidata item Q19600: nonmetal - identity and sense of the item
- Wikipedia: Nonmetal - general description of the item
Open questions
- Should metalloid be a separate primary entry?
- How should classification schemes be recorded?
- How should IUPAC sources be linked?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q19600/spec.json