# Californium ## 🧊 Californium · 3D (three.js) <iframe src="https://wikitube-elements.netlify.app/?el=Cf&embed=1" width="100%" height="620" frameborder="0" style="border:0;border-radius:12px;overflow:hidden" allowfullscreen loading="lazy" title="The Elements 3D microsim - Californium"></iframe> *Californium 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=Cf) <!-- ELEMENTS_MICROSIM:END --> !Californium plate.svg *Plate 98 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.* - Neutron source - californium-252 as a spontaneous fission emitter - Neutron radiography - medical and industrial imaging with californium sources - Nuclear medicine - californium in cancer treatment and diagnostics - Synthetic element - californium as product of alpha bombardment in particle accelerators ## Links (Wikipedia order) <!-- injected from _registry/childlinks/Californium.json (2026-07-30T02:09:12Z) --> `Actinide` · [[Actinium]] · `Albert_Ghiorso` · `Alkali_metal` · `Alkaline_earth_metal` · [[Alloy]] · [[Alpha_decay]] · [[Alpha_particle]] · [[Aluminium]] · [[Americium]] · `Antiferromagnetism` · [[Antimony]] · `Aqueous_solution` · [[Argon]] · [[Arsenic]] · [[Astatine]] · `Atomic_number` · [[Barium]] · `Berkeley,_California` · [[Berkelium]] · [[Beryllium]] · [[Beta_decay]] · `Bioaccumulation` · [[Bismuth]] · `Block_(periodic_table)` · [[Bohrium]] · [[Boiling_point]] · [[Boron]] · `Boron_group` · `Brain_tumor` · [[Bromine]] · `Bulk_material_analyzer` · `Bulk_modulus` · `CAS_Registry_Number` · [[Cadmium]] · [[Caesium]] · [[Calcium]] · `Calcium-48` · `California` · `Californium(II)_iodide` · `Californium(III)_bromide` · `Californium(III)_chloride` · `Californium(III)_fluoride` · `Californium(III)_iodide` · `Californium(III)_nitrate` · `Californium(III)_oxide` · `Californium(III)_oxybromide` · `Californium(III)_oxychloride` · `Californium(III)_oxyfluoride` · `Californium(III)_oxyiodide` · `Californium(III)_polyborate` · `Californium(IV)_oxide` · `Californium_(video_game)` · `Californium_compounds` · `Californium_dichloride` · `Californium_tetrafluoride` · [[Carbon]] · `Carbon_group` · [[Cerium]] · `Cervical_cancer` · `Chalcogen` · `Chemical_symbol` · `Chloride` · [[Chlorine]] · [[Chromium]] · `Close-packing_of_equal_spheres` · `Coal_analyzer` · [[Cobalt]] · [[Copernicium]] · [[Copper]] · [[Corrosion]] · `Critical_mass` · [[Crystal_structure]] · [[Cubic_crystal_system]] · [[Curium]] · `Cyclotron` · 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`Synthetic_radioisotope` · [[Tantalum]] · [[Technetium]] · [[Tellurium]] · [[Tennessine]] · [[Terbium]] · [[Thallium]] · [[Thorium]] · [[Thulium]] · `Timeline_of_chemical_element_discoveries` · [[Tin]] · [[Titanium]] · `Transuranium_element` · [[Tungsten]] · `U.S._state` · `Unit_cell` · `United_States_Atomic_Energy_Commission` · `United_States_Department_of_Energy` · `University_of_California,_Berkeley` · [[Uranium]] · `Uranium-238` · [[Vanadium]] · [[Xenon]] · [[Ytterbium]] · [[Yttrium]] · [[Zinc]] · [[Zirconium]] > **Official MAIN - Chemical element, Z = 98.** 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: Californium](https://en.wikipedia.org/wiki/Californium). <!-- ELEMENTS_MICROSIM:BEGIN (auto-managed block - edits inside will be overwritten) --> ## Key facts (infobox) | | | |---|---| | Symbol - Z | Cf - 98 | | Group - Period - Block | f - 7 - f-block | | Atomic weight (Da) | [251] | | Density (g/cm3) | 15.1 | | Melting - Boiling (K) | 1173 - (1743) | | Electronegativity (Pauling) | 1.3 | | Crustal abundance (mg/kg) | - | | Origin | synthetic | | Phase (STP) | solid | | Name origin | California (LBNL) | *Bracketed weights are the mass number of the most stable isotope; values in parentheses are predictions (per the source table).* ## Story Californium was first synthesized in 1950 by Glenn T. Seaborg, Stanley Thompson, Kenneth Street Jr., and Albert Ghiorso at the University of California's Lawrence Berkeley Laboratory. It was named after California and the university, honoring the tradition of naming elements after their place of discovery. Californium-251, the longest-lived isotope, has a half-life of 898 years. [model-prior - verify] Californium is produced by bombarding curium with alpha particles or by bombarding lighter actinides with neutrons in reactor environments. Californium is a silvery, highly radioactive actinide metal. It is an intense alpha and gamma emitter. Californium-252, a shorter-lived isotope with a 2.65-year half-life, is a prolific neutron source and has found practical applications in neutron radiography, medical diagnostics, and cancer treatment. [model-prior - verify] Californium is also used in portable neutron detectors and industrial applications. The element's intense radioactivity makes handling it extremely hazardous. In the canon, californium represents the early post-war era when nuclear physics had both benign and weapons applications being actively developed in parallel, and when American scientific institutions were at the frontier of creating matter itself. ## Corpus connections Californium is a practical element in the transuranium family—its neutron-rich isotopes find real-world applications in medicine, industry, and scientific research, despite the extreme hazard of handling. - 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 - [Neutron source](https://en.wikipedia.org/wiki/Neutron_source) - californium-252 as a portable neutron emitter - [Cancer radiotherapy](https://en.wikipedia.org/wiki/Radiotherapy) - californium in medical neutron beam therapy ## Vocational-Technical Semiotics The element speaks the canon's shared signs: the periodic table cell (Cf, group f, 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: [[Berkelium|Berkelium (97)]] - [[Einsteinium|Einsteinium (99)]] - R.E.A.C.T.I.O.N. - Centers of Excellence ## Wikipedia : Wikitube **Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Californium) : [Wikitube](https://en.wikitube.io/wiki/Californium) ## Previous hub tags Tree parents: [[Helium]] · [[Hydrogen]] · [[Oxygen]]. Legacy hubs: none. --- *Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*