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.
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 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.
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.
What it is for: Scientific research.
It can be explain the element; relay discovery and properties; describe isotopes; distinguish related elements.
Distinguishing features
Synthetic
Atom-at-a-time chemistry
Named for Mendeleev
Research only
What it looks like
Not observed in bulk; produced a few atoms at a time.
Physical character
atomic number: 101 count
discovered: 1955 year - Berkeley
longest-lived isotope: mendelevium-258, about 51 days note
first synthesis yield: about 17 atoms note
How it is recognised
Actinide element 101
Mendelevium-244 to mendelevium-260 isotopes
Fermium is element 100; nobelium is element 102
Related models
is a kind of - in registry terms
is named after -
was made from -
is neighboured by - and nobelium
In practice
Families and kinds
mendelevium isotopes
mendelevium ions in solution chemistry studies
Identifiers
CAS 7440-11-1 mendelevium
atomic number 101
Standards and regulation
Radiation protection regulations
IUPAC element naming
Failure modes and hazards
Radioactivity
Agents giving operational nuclear detail
Registry aliases listing many isotopes
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.mendelevium
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 mendelevium is.
Science.
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.
Science.
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.
Sources.
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.
Context.
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
What the second pass must settle
- 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?