Dubnium - Wikiparency

# Dubnium ## 🧊 Dubnium · 3D (three.js) <iframe src="https://wikitube-elements.netlify.app/?el=Db&embed=1" width="100%" height="620" frameborder="0" style="border:0;border-radius:12px;overflow:hidden" allowfullscreen loading="lazy" title="The Elements 3D microsim - Dubnium"></iframe> *Dubnium 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=Db)  !Dubnium plate.svg *Plate 105 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.* - Relativistic quantum mechanics - essential for understanding superheavy element behavior - [[Nuclear_fusion|Nuclear fusion]] - the process creating superheavy elements in accelerators - [[Americium|Americium]] - the target nucleus for Dubnium synthesis - Transactinide element - the superheavy frontier beyond actinides ## Links (Wikipedia order)  `Aaldert_Wapstra` · [[Actinium]] · `Albert_Ghiorso` · `Alkali_metal` · `Alkaline_earth_metal` · [[Alpha_decay]] · [[Aluminium]] · [[Americium]] · [[Antimony]] · `Aqua_regia` · `Aqueous_solution` · [[Argon]] · [[Arsenic]] · [[Astatine]] · `Atomic_nucleus` · `Atomic_number` · `Atomic_orbital` · `Atomic_radius` · `Australian_National_University` · `Azimuthal_quantum_number` · [[Barium]] · `Berkeley,_California` · [[Berkelium]] · [[Beryllium]] · [[Beta_decay]] · [[Bismuth]] · `Block_(periodic_table)` · `Bloomberg_Businessweek` · [[Bohrium]] · [[Boron]] · `Boron_group` · [[Bromine]] · `CAS_Registry_Number` · 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Infobox grounded in [Wikipedia: List of chemical elements](https://en.wikipedia.org/wiki/List_of_chemical_elements), fetched 2026-07-08. Full article: [Wikipedia: Dubnium](https://en.wikipedia.org/wiki/Dubnium).  ## Key facts (infobox) | | | |---|---| | Symbol - Z | Db - 105 | | Group - Period - Block | 5 - 7 - d-block | | Atomic weight (Da) | [268] | | Density (g/cm3) | (21.6) | | Melting - Boiling (K) | - - - | | Electronegativity (Pauling) | - | | Crustal abundance (mg/kg) | - | | Origin | synthetic | | Phase (STP) | unknown | | Name origin | Dubna, Russia (JINR) | *Bracketed weights are the mass number of the most stable isotope; values in parentheses are predictions (per the source table).* ## Story Dubnium was first synthesized in 1967 at the Joint Institute for Nuclear Research (JINR) in Dubna, Russia, through the bombardment of americium-243 with neon-22 ions. The element is named for the city of Dubna, home to the JINR laboratory where it was discovered—one of the few elements named for a geographic location rather than a person, honoring the collective achievement of the Soviet nuclear physics program. Db-268 has a half-life of approximately 29 hours [model-prior - verify], making it one of the longer-lived superheavy elements available for study. Dubnium belongs to group 5 of period 7, in the transactinide series where relativistic effects become dominant in atomic structure. Its chemistry is predicted to resemble that of vanadium and tantalum, though the extreme nuclear charge at Z=105 means relativistic distortion of electron orbitals becomes profound [model-prior - verify]. The element continues the transuranic lineage: each nucleus is born from two smaller nuclei fused in an accelerator, existing for seconds before decay. The naming is distinct in the elements canon: it honors a place, not a person. Dubna itself represents the international laboratory where the atomic frontier moved—where the Soviet physics tradition created elements the West discovered, yet could not claim alone. It marks the synthesis arc's expansion beyond Western institutions and nationalism. ## 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 - [Joint Institute for Nuclear Research](https://en.wikipedia.org/wiki/Joint_Institute_for_Nuclear_Research) - Soviet and international laboratory where Dubnium was synthesized ## Vocational-Technical Semiotics The element speaks the canon's shared signs: the periodic table cell (Db, group 5, period 7), 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: [[Rutherfordium|Rutherfordium (104)]] - [[Seaborgium|Seaborgium (106)]] - R.E.A.C.T.I.O.N. - Centers of Excellence ## Wikipedia : Wikitube **Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Dubnium) : [Wikitube](https://en.wikitube.io/wiki/Dubnium) ## Previous hub tags Tree parents: [[Helium]] · [[Hydrogen]] · [[Oxygen]]. Legacy hubs: none. --- *Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*