molybdenum
Let an agent identify molybdenum and its properties, relay production, uses, isotopes and biological roles from reference sources, explain the medical importance of molybdenum-99, and distinguish it from similar metals.
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 molybdenum and its properties, relay production, uses, isotopes and biological roles from reference sources, explain the medical importance of molybdenum-99, and distinguish it from similar metals.
A chemical element with symbol Mo and atomic number 42, a hard, silvery transition metal with one of the highest melting points, not found free in nature but obtained mainly from molybdenite; molybdenum is used chiefly in steel alloys for strength and corrosion resistance, in catalysts, lubricants as molybdenum disulfide and electrodes, is an essential trace element in enzymes, and has seven natural isotopes including molybdenum-99 used as the parent of technetium-99m in medical imaging.
What it is for: Steel alloying, catalysts, lubricants and medical isotope production.
It can be relay properties and isotopes; explain production and uses; explain medical isotope role; distinguish from similar metals.
Distinguishing features
Very high melting point
Steel alloying element
Essential in enzymes
Mo-99 for medical imaging
What it looks like
A hard, grey metal with a high melting point.
Physical character
atomic number: 42 Z
standard atomic weight: 95.95 u
melting point: 2623 degrees C
density: 10.28 g/cm3
How it is recognised
Element 42, symbol Mo
Refractory transition metal
Tungsten and chromium are related group 6 metals
Related models
is a kind of - in registry terms
is a kind of - group 6
is used in - as an alloying element
is the parent of - through molybdenum-99
In practice
Families and kinds
molybdenum metal and alloys
molybdenum compounds such as disulfide and trioxide
isotopes from molybdenum-83 to molybdenum-117, with seven natural and Mo-99 medically important
molybdenum in enzymes such as nitrogenase and xanthine oxidase
Identifiers
symbol Mo
CAS 7439-98-7
Standards and regulation
Occupational exposure limits
Dietary reference intakes for molybdenum
Regulation of medical isotope production and supply
Chemical safety data sheets
Failure modes and hazards
Medical isotope supply shortages
Toxicity of some compounds
Supply concentration
Confusion with similar metals
Also called
+6
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.molybdenum
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 molybdenum is.
Identity.
Properties
Properties.
Properties
Properties.
- What are the physical and chemical properties of molybdenum? definition
- Is the question about molybdenum or a related metal such as tungsten? boundary
Isotopes
Isotopes.
Isotopes
Isotopes.
- Which isotopes exist, and why is molybdenum-99 important? definition
- Which entry fits the specific isotope? action
Industry Production and uses.
Supply.
Production
Mining and refining.
Production
Production.
- How is molybdenum mined and refined, and who produces it, with sources? provenance
- Which sources are cited? provenance
Uses
Uses.
Uses
Uses.
- How is molybdenum used in steel, catalysts, lubricants and electronics? provenance
- Which entry fits a specific alloy or product? action
Science Biology and medicine.
Science.
Biology
Biological role.
Biology
Biology.
- What role does molybdenum play in enzymes and nutrition? provenance
- Which references are standard? provenance
Medical
Medical isotopes.
Medical
Medical.
- How is molybdenum-99 produced and used to supply technetium-99m, and why have shortages occurred? provenance
- Which entry fits technetium-99m? action
Context History and safety.
Context.
History
History.
History
History.
- How was molybdenum identified by Scheele and Hjelm, and how did its use in steel develop? provenance
- Which entry fits the history of chemistry? action
Safety
Safety.
Safety
Safety.
- What hazards do molybdenum compounds present, and what limits apply? provenance
- Is the user asking about a personal exposure, which needs a clinician or poison centre? boundary
What the second pass must settle
- Should molybdenum-99 be a separate entry?
- How should reference data be linked?
- The registry entry has merged aliases naming isotopes; should they be split off?