mendelevium
Let an agent explain mendelevium, relay its discovery, properties and isotopes from chemistry references at a public level, describe the isotopes the registry aliases name as a group, and distinguish mendelevium from fermium, nobelium and other heavy actinides, without operational nuclear detail.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Understand What mendelevium is.
Definition
Definition.
Definition
Definition.
- What is mendelevium, and how does it differ from fermium and nobelium? definition
- Is the question about public reference facts, or operational detail the model does not give? boundary
Isotopes
Isotopes.
Isotopes
Isotopes.
- What are the main mendelevium isotopes and their half-lives? definition
- Which entry fits isotopes of mendelevium? action
Science Chemistry.
Chemistry
Chemistry.
Chemistry
Chemistry.
- What has atom-at-a-time chemistry revealed about mendelevium? provenance
- Which references are standard? provenance
Production
Production.
Production
Production.
- How is mendelevium produced, at a general level? provenance
- Which sources are cited? provenance
History History.
Discovery
Discovery.
Discovery
Discovery.
- How did Ghiorso, Seaborg and colleagues discover mendelevium in 1955? provenance
- Which entry fits Albert Ghiorso? action
Naming
Naming.
Naming
Naming.
- Why was it named after Mendeleev during the Cold War? provenance
- Which entry fits Dmitri Mendeleev? action
Context Heavy elements.
Heavy
Heavy element research.
Heavy
Heavy.
- How does mendelevium fit into heavy element research? provenance
- Which entry fits transuranium element? action
Table
Periodic table.
Table
Table.
- Where does mendelevium sit in the periodic table? provenance
- Which entry fits periodic table? 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
- mendelevium-245, mendelevium-246, mendelevium-247, mendelevium-248, mendelevium-249, mendelevium-250, mendelevium-251, mendelevium-252, mendelevium-253, mendelevium-254, mendelevium-255, mendelevium-256
What it is Filled
A synthetic radioactive actinide element with atomic number 101, symbol Md, first produced in 1955 at Berkeley by bombarding einsteinium with alpha particles and named after Dmitri Mendeleev, creator of the periodic table, made only a few atoms at a time, with isotopes from about mendelevium-244 to mendelevium-260 of which mendelevium-258 has the longest half-life of about 51 days; it has no uses outside research. The model gives public reference information only.
Why it exists Filled
Let an agent explain mendelevium, relay its discovery, properties and isotopes from chemistry references at a public level, describe the isotopes the registry aliases name as a group, and distinguish mendelevium from fermium, nobelium and other heavy actinides, without operational nuclear detail.
Distinguishing features Filled
- Synthetic
- Atom-at-a-time chemistry
- Named for Mendeleev
- Research only
What robots and AI may and may not do Filled
Must not
- Give operational detail on producing or handling heavy radioactive elements.
- Present predicted properties as measured ones.
- Confuse mendelevium with other actinides.
Only with a human decision
- Any work with radioactive material, which only licensed facilities may decide.
May
- Explain mendelevium's discovery, place in the periodic table and known properties.
- Cite chemistry references for isotope data and half-lives.
Moral aspects Filled
- Mendelevium exists only in tiny amounts in research facilities under strict radiation control.
- Honesty about what is measured and what is predicted keeps science trustworthy.
Who is affected
- Researchers
- Students
- Workers in nuclear facilities
Owners Filled
Steward
The licensed research facility that produces it; nobody else holds it.
Links to other meta-models Filled
parent
- Q19577 - registry parent class
related
- actinide - in registry terms
- Dmitri Mendeleev
- einsteinium
- fermium - and nobelium
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.mendelevium
- Wikidata: Q1898 (https://www.wikidata.org/wiki/Q1898)
- CAS: 7440-11-1 mendelevium
- atomic number: 101
Direct properties required Filled
- atomic number: 101 count
- discovered: 1955 year - Berkeley
- longest-lived isotope: mendelevium-258, about 51 days note
- first synthesis yield: about 17 atoms note
Recognition required Filled
- Actinide element 101
- Mendelevium-244 to mendelevium-260 isotopes
- Fermium is element 100; nobelium is element 102
- Not observed in bulk; produced a few atoms at a time.
Capabilities and actions required Filled
- explain the element
- relay discovery and properties
- describe isotopes
- distinguish related elements
Hazards and failure modes required Filled
- Radioactivity
- Agents giving operational nuclear detail
- Registry aliases listing many isotopes
Standards and interfaces required Filled
- Radiation protection regulations
- IUPAC element naming
Context of use required Filled
- Scientific research.
- mendelevium isotopes
- mendelevium ions in solution chemistry studies
Sources Filled
- Wikidata item Q1898: mendelevium - identity and sense of the item
- Wikipedia: Mendelevium - general description of the item
Open questions
- Should the isotopes be grouped as one sub-entry?
- How should chemistry references be linked?
- The registry entry lists isotope aliases; should they be grouped?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q1898/spec.json