Lawrencium - Wikiparency

# Lawrencium ## 🧊 Lawrencium · 3D (three.js) <iframe src="https://wikitube-elements.netlify.app/?el=Lr&embed=1" width="100%" height="620" frameborder="0" style="border:0;border-radius:12px;overflow:hidden" allowfullscreen loading="lazy" title="The Elements 3D microsim - Lawrencium"></iframe> *Lawrencium 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=Lr)  !Lawrencium plate.svg *Plate 103 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.* - Cyclotron - the invention enabling all transuranium synthesis - [[Californium|Californium]] - the target nucleus in Lawrencium creation - Boron-10 - the accelerated projectile for Lawrencium synthesis - Ernest Lawrence - the physicist-entrepreneur whose vision built the accelerator ## Links (Wikipedia order)  `Aaldert_Wapstra` · `Acetate` · `Acid` · `Actinide` · `Actinide_concept` · [[Actinium]] · `Albert_Ghiorso` · `Alkali_metal` · `Alkaline_earth_metal` · [[Alpha_decay]] · [[Alpha_particle]] · [[Aluminium]] · [[Americium]] · [[Antimony]] · `Aqueous_solution` · [[Argon]] · [[Arsenic]] · [[Astatine]] · `Atomic_nucleus` · `Atomic_number` · `Atomic_orbital` · `Aufbau_principle` · `Australian_National_University` · [[Barium]] · `Bent_molecular_geometry` · [[Berkelium]] · [[Beryllium]] · [[Beta_decay]] · [[Bismuth]] · `Block_(periodic_table)` · `Bloomberg_Businessweek` · [[Bohrium]] · [[Boron]] · `Boron_group` · [[Bromine]] · `Bulk_modulus` · 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`William_B._Jensen` · `World_Scientific` · `X-ray` · [[Xenon]] · [[Ytterbium]] · [[Yttrium]] · `Yuri_Oganessian` · [[Zinc]] · [[Zirconium]] > **Official MAIN - Chemical element, Z = 103.** 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: Lawrencium](https://en.wikipedia.org/wiki/Lawrencium).  ## Key facts (infobox) | | | |---|---| | Symbol - Z | Lr - 103 | | Group - Period - Block | 3 - 7 - d-block | | Atomic weight (Da) | [266] | | Density (g/cm3) | (14.4) | | Melting - Boiling (K) | (1900) - - | | Electronegativity (Pauling) | 1.3 | | Crustal abundance (mg/kg) | - | | Origin | synthetic | | Phase (STP) | unknown | | Name origin | Ernest Lawrence | *Bracketed weights are the mass number of the most stable isotope; values in parentheses are predictions (per the source table).* ## Story Lawrencium was first synthesized in 1961 at the Lawrence Berkeley Laboratory by a team led by Alvin Ghiorso and Emilio Segrè, through bombardment of californium-250 with boron-10 nuclei. The element is named for Ernest Lawrence, the physicist who invented the cyclotron in 1930—the machine that enabled the creation of all synthetic elements and transformed nuclear physics into an accelerator-based science. Lr-266 has a half-life of approximately 11 hours, making it the first transuranic element whose chemistry could be studied to a limited degree [model-prior - verify]. Lawrencium marks the end of the actinide series and the beginning of the transition metals in period 7. Though its chemistry remains largely predicted, it is expected to display the +3 oxidation state of the actinides [model-prior - verify]. The element embodies a pivotal truth: Technetium was conceived through theoretical prediction; Lawrencium could only be born through the cyclotron—the instrument that made Technetium's creation possible, now honored in the periodic table. The naming recognizes Ernest Lawrence as the architect of the machine age in nuclear science. Without the cyclotron, Mendelevium's table-gap prediction would have remained forever beyond human reach. Lawrencium is the canonization of the tool itself. ## 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 - [Ernest Lawrence](https://en.wikipedia.org/wiki/Ernest_Lawrence) - inventor of the cyclotron and creator of the machine age in nuclear physics ## Vocational-Technical Semiotics The element speaks the canon's shared signs: the periodic table cell (Lr, group 3, 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: [[Nobelium|Nobelium (102)]] - [[Rutherfordium|Rutherfordium (104)]] - R.E.A.C.T.I.O.N. - Centers of Excellence ## Wikipedia : Wikitube **Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Lawrencium) : [Wikitube](https://en.wikitube.io/wiki/Lawrencium) ## Previous hub tags Tree parents: [[Helium]] · [[Hydrogen]] · [[Oxygen]]. Legacy hubs: none. --- *Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*