# Potassium ## 🧊 Potassium · 3D (three.js) <iframe src="https://wikitube-elements.netlify.app/?el=K&embed=1" width="100%" height="620" frameborder="0" style="border:0;border-radius:12px;overflow:hidden" allowfullscreen loading="lazy" title="The Elements 3D microsim - Potassium"></iframe> *Potassium 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=K) <!-- ELEMENTS_MICROSIM:END --> !Potassium plate.svg *Plate 19 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.* - Potassium in nutrition - biological role and dietary requirements - Potassium fertilizer - potash and agricultural chemistry - Alkali metal - reactivity series and group 1 chemistry - Soap - potassium salts and saponification reactions - Potassium-40 - natural radioactivity and body radiation ## Links (Wikipedia order) <!-- injected from _registry/childlinks/Potassium.json (2026-07-30T02:09:12Z) --> `Aaldert_Wapstra` · `Acid` · [[Actinium]] · `Active_transport` · `Adenosine_triphosphate` · `Afferent_nerve_fiber` · `Agriculture` · `Air-free_technique` · `Alkali` · `Alkali_metal` · `Alkaline_earth_metal` · `Alkalosis` · [[Alloy]] · `Almond` · [[Aluminium]] · [[Americium]] · `Ammonia` · `Anhydrous` · [[Antimony]] · `Antoine_Lavoisier` · `Apricot` · [[Argon]] · `Arrhythmia` · [[Arsenic]] · [[Astatine]] · `Atomic_number` · `Atomic_radius` · `Aureolin` · `Avocado` · `Baking_powder` · `Bamboo_shoot` · `Banana` · [[Barium]] · `Becquerel` · `Beer` · `Belarus` · 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`Ullmann's_Encyclopedia_of_Industrial_Chemistry` · `United_States_Department_of_Agriculture` · [[Uranium]] · `Valence_electron` · `Van_der_Waals_radius` · [[Vanadium]] · `Voltaic_pile` · `Vomiting` · [[Wayback_Machine]] · `Weathering` · `Wine` · `World_Health_Organization` · `X-ray_fluorescence` · [[Xenon]] · `Yam_(vegetable)` · `Young's_modulus` · [[Ytterbium]] · [[Yttrium]] · [[Zinc]] · [[Zirconium]] > **Official MAIN - Chemical element, Z = 19.** 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: Potassium](https://en.wikipedia.org/wiki/Potassium). <!-- ELEMENTS_MICROSIM:BEGIN (auto-managed block - edits inside will be overwritten) --> ## Key facts (infobox) | | | |---|---| | Symbol - Z | K - 19 | | Group - Period - Block | 1 - 4 - s-block | | Atomic weight (Da) | 39.098 | | Density (g/cm3) | 0.89 | | Melting - Boiling (K) | 336.53 - 1032 | | Electronegativity (Pauling) | 0.82 | | Crustal abundance (mg/kg) | 20900 | | Origin | primordial | | Phase (STP) | solid | | Name origin | Neo-Latin potassa, 'potash'; symbol from Latin kalium | *Bracketed weights are the mass number of the most stable isotope; values in parentheses are predictions (per the source table).* ## Story Potassium was first isolated in 1807 by Sir Humphry Davy through the electrolysis of molten potassium hydroxide, making it the first metal to be isolated by electrolysis. The element's name derives from the English word "potash," the ash-like residue left after burning wood in a pot—a substance known and used for centuries in soap and glass making. The Latin symbol *K* comes from the Medieval Latin *kalium*, which traces to Arabic *al-qali*, meaning plant ashes. Davy's discovery of potassium marked a revolutionary moment in chemistry, as he showed that seemingly indestructible "elements" could be decomposed by electrical current. Potassium is a soft, highly reactive alkali metal that floats on water and spontaneously ignites due to the heat of its own reaction [model-prior - verify]. Despite this extreme reactivity, potassium is essential for all animal life, ranking as the eighth most abundant element in the human body and the third most abundant cation (after hydrogen and sodium). Potassium ions regulate nerve impulses, muscle contractions, and heart function; potassium deficiency causes serious medical complications [model-prior - verify]. The element ranks as one of the "big three" macronutrients in fertilizer alongside nitrogen and phosphorus. Potassium compounds appear in soaps, detergents, and explosives. Naturally occurring potassium-40 is radioactive and contributes to the body's baseline radiation exposure [model-prior - verify]. In this corpus, potassium completes the **agricultural nutrient triad** with nitrogen and phosphorus. Together, these three elements are the foundation of global food security and define the chemical requirements of modern civilization. ## 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 - Agriculture Centers of Excellence - potassium fertilizer and crop nutrition - External: [Potassium-argon_dating - en.wikipedia.org](https://en.wikipedia.org/wiki/Potassium%E2%80%93argon_dating) via K-40 decay - SOLAR SYSTEM MINING SURVEYS - potassium in lunar regolith and rocky bodies ## Vocational-Technical Semiotics The element speaks the canon's shared signs: the periodic table cell (K, group 1, period 4), 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: [[Argon|Argon (18)]] - [[Calcium|Calcium (20)]] - R.E.A.C.T.I.O.N. - Centers of Excellence ## Wikipedia : Wikitube **Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Potassium) : [Wikitube](https://en.wikitube.io/wiki/Potassium) ## Previous hub tags Tree parents: [[Helium]] · [[Hydrogen]] · [[Oxygen]]. Legacy hubs: none. --- *Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*