# Molybdenum ## 🧊 Molybdenum · 3D (three.js) <iframe src="https://wikitube-elements.netlify.app/?el=Mo&embed=1" width="100%" height="620" frameborder="0" style="border:0;border-radius:12px;overflow:hidden" allowfullscreen loading="lazy" title="The Elements 3D microsim - Molybdenum"></iframe> *Molybdenum in the live three.js Elements explorer — drag to orbit the atom, click any tile to compare, slide the temperature.* · [▶ open full](https://wikitube-elements.netlify.app/?el=Mo) <!-- ELEMENTS_MICROSIM:END --> !Molybdenum plate.svg *Plate 42 of 118 - animated Bohr shells, stylized per Madelung filling; engraving style per house Arcanity kit.* ## Microsim To Do *Claimable rows, house pattern. Real Wikipedia articles only.* - Molybdenum-99 generator - industrial parent of technetium-99m - Catalytic converter - molybdenum's role in emissions control - Molybdenite - the primary ore mineral - Refractory metals - high-temperature material science ## Links (Wikipedia order) <!-- injected from _registry/childlinks/Molybdenum.json (2026-07-30T02:09:12Z) --> `Abundance_of_elements_in_Earth's_crust` · `Acrolein` · `Acrylonitrile` · [[Actinium]] · `Active_site` · `Alkali_metal` · `Alkaline_earth_metal` · [[Alloy]] · [[Aluminium]] · `Aluminothermic_reaction` · [[Americium]] · `Ammoxidation` · `Anatolian_languages` · `Ancient_Greek` · `Anemia` · `Angiogenesis` · [[Antimony]] · [[Argon]] · [[Arsenic]] · [[Astatine]] · [[Atomic_mass]] · `Atomic_number` · `Atomic_radius` · [[Barium]] · `Base_(chemistry)` · [[Berkelium]] · [[Beryllium]] · `Bingham_Canyon_Mine` · `Biosphere` · `Biosynthesis` · [[Bismuth]] · `Block_(periodic_table)` · [[Bohrium]] · [[Boiling_point]] · [[Boron]] · 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· `Tooth_enamel` · `Torpedo` · `Transition_metal` · [[Tungsten]] · `University_of_North_Carolina` · [[Uranium]] · `Uranium_dioxide` · `Uric_acid` · `Urine` · [[Vanadium]] · `Vapor_pressure` · `Vickers_hardness_test` · `Vitreous_enamel` · [[Wayback_Machine]] · `Weldability` · `Wilson's_disease` · `World_War_I` · `World_War_II` · `Xanthine` · `Xanthine_oxidase` · [[Xenon]] · `Xenon-135` · `Young's_modulus` · [[Ytterbium]] · [[Yttrium]] · [[Zinc]] · [[Zirconium]] > **Official MAIN - Chemical element, Z = 42.** Part of the Elements Canon (one canonical page per element). Infobox grounded in [Wikipedia: List of chemical elements](https://en.wikipedia.org/wiki/List_of_chemical_elements), fetched 2026-07-08. Full article: [Wikipedia: Molybdenum](https://en.wikipedia.org/wiki/Molybdenum). <!-- ELEMENTS_MICROSIM:BEGIN (auto-managed block - edits inside will be overwritten) --> ## Key facts (infobox) | | | |---|---| | Symbol - Z | Mo - 42 | | Group - Period - Block | 6 - 5 - d-block | | Atomic weight (Da) | 95.95 | | Density (g/cm3) | 10.28 | | Melting - Boiling (K) | 2896 - 4912 | | Electronegativity (Pauling) | 2.16 | | Crustal abundance (mg/kg) | 1.2 | | Origin | primordial | | Phase (STP) | solid | | Name origin | Greek molybdos, 'lead' (confusion with galena) | *Bracketed weights are the mass number of the most stable isotope; values in parentheses are predictions (per the source table).* ## Story Molybdenum was isolated as an element in 1778 by Swedish chemist Carl Wilhelm Scheele through reduction of molybdenum oxide, though the element had been confused with graphite and lead sulfide (galena) in mineral form for centuries. The name derives from Greek "molybdos," meaning lead, a testament to the historical confusion of molybdenite ore with lead compounds. Molybdenum is relatively scarce in the crust (1.2 mg/kg) and occurs primarily in molybdenite (MoS₂). Molybdenum is a refractory metal valued for its high melting point (2896 K) and strength at elevated temperatures. It is a component of high-strength steel alloys and catalysts in petroleum refining and nitrogen fixation. [model-prior - verify] Most critically for the canon, molybdenum-99 (Mo-99) is the parent isotope from which technetium-99m (Tc-99m) is extracted daily in hospitals worldwide: Mo-99 decays to Tc-99m via molybdenum-99 generators, supplying over 90% of the Tc-99m used in nuclear medicine. [model-prior - verify] The corpus embeds molybdenum into its patron element's story directly: Technetium-99m would not exist as a medical tool without molybdenum-99 as its parent. The historical discovery path—molybdenum first, then technetium created from it—exemplifies the corpus's theme of making-before-finding. ## Corpus connections - R.E.A.C.T.I.O.N. - the Chemistry hub - Centers of Excellence Portal - [[Technetium|Technetium - the element made before found]] - the canon's patron - and Technitium, the School - Space Mining in Minnesota - molybdenum-99 generators supply technetium-99m for diagnostic imaging in planetary exploration and health ## Vocational-Technical Semiotics The element speaks the canon's shared signs: the periodic table cell (Mo, group 6, period 5), isotope notation, and hazard pictograms ghs where handling demands it. ## Sources Infobox: [en.wikipedia.org/wiki/List_of_chemical_elements](https://en.wikipedia.org/wiki/List_of_chemical_elements) (fetched 2026-07-08); etymology per the same table's notes. Story sources to be added at enrichment. ## Navigation - Canon: Elements Canon index - neighbors by Z: [[Niobium|Niobium (41)]] - [[Technetium|Technetium (43)]] - R.E.A.C.T.I.O.N. - Centers of Excellence ## Wikipedia : Wikitube **Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Molybdenum) : [Wikitube](https://en.wikitube.io/wiki/Molybdenum) ## Previous hub tags Tree parents: [[Helium]] · [[Hydrogen]] · [[Oxygen]]. Legacy hubs: none. --- *Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*