Calcium - Wikiparency

# Calcium ## 🧊 Calcium · 3D (three.js) <iframe src="https://wikitube-elements.netlify.app/?el=Ca&embed=1" width="100%" height="620" frameborder="0" style="border:0;border-radius:12px;overflow:hidden" allowfullscreen loading="lazy" title="The Elements 3D microsim - Calcium"></iframe> *Calcium 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=Ca)  !Calcium plate.svg *Plate 20 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.* - Limestone - calcium carbonate mineralogy and sedimentary rock formation - Bone - calcium phosphate hydroxyapatite and skeletal structure - Portland cement - calcium silicates and construction materials - Calcium signaling - cellular ion dynamics and neural transmission - Osteoporosis - calcium deficiency and bone density loss ## Links (Wikipedia order)  `Abundance_of_elements_in_Earth's_crust` · `Acetylene` · [[Actinium]] · `Alkali_metal` · `Alkaline_earth_metal` · [[Alpha_particle]] · `Aluminate` · [[Aluminium]] · [[Americium]] · `Ammonia` · `Angular_momentum` · `Anhydrite` · `Antacid` · [[Antimony]] · `Antoine_Lavoisier` · `Apatite` · `Aragonite` · `Arginine_alpha-ketoglutarate` · [[Argon]] · [[Arsenic]] · `Aspartic_acid` · [[Astatine]] · `Atomic_number` · `Atomic_radius` · `Automotive_battery` · `B_vitamins` · [[Barium]] · `Basalt` · [[Berkelium]] · [[Beryllium]] · [[Beta_decay]] · `Bicarbonate` · `Bifidobacterium` · `Biochemistry` · `Biotin` · [[Bismuth]] · `Bisphosphonate` · `Block_(periodic_table)` · `Bodybuilding_supplement` · [[Bohrium]] · [[Boiling_point]] · `Bone_sialoprotein` · [[Boron]] · `Boron_group` · `Breakfast_cereal` · `Brinell_hardness_test` · `Briquette` · [[Bromine]] · `Bulk_modulus` · `CAS_Registry_Number` · [[Cadmium]] · [[Caesium]] · `Calcification` · `Calcite` · `Calcitonin` · `Calcium(I)_chloride` · `Calcium-48` · `Calcium_(disambiguation)` · `Calcium_acetate` · `Calcium_aluminates` · `Calcium_arsenate` · `Calcium_arsenide` · `Calcium_azide` · `Calcium_bicarbonate` · `Calcium_bisulfite` · `Calcium_borate` · `Calcium_bromate` · `Calcium_bromide` · `Calcium_carbide` · `Calcium_carbonate` · `Calcium_chlorate` · `Calcium_chloride` · `Calcium_chromate` · `Calcium_citrate` · `Calcium_citrate_malate` · `Calcium_cyanamide` · `Calcium_cyanide` · `Calcium_cycle` · `Calcium_diglutamate` · `Calcium_disilicide` · `Calcium_dobesilate` · `Calcium_erythorbate` · `Calcium_fluoride` · `Calcium_formate` · `Calcium_fructoborate` · `Calcium_fumarate` · `Calcium_glubionate` · `Calcium_glucoheptonate` · `Calcium_gluconate` · `Calcium_glycerylphosphate` · `Calcium_guanylate` · `Calcium_hydride` · `Calcium_hydroxide` · `Calcium_hydroxychloride` · `Calcium_hypochlorite` · `Calcium_in_biology` · `Calcium_inosinate` · `Calcium_iodate` · `Calcium_iodide` · `Calcium_lactate` · `Calcium_malate` · `Calcium_monophosphide` · `Calcium_monosilicide` · `Calcium_nitrate` · `Calcium_nitride` · `Calcium_nitrite` · `Calcium_oxalate` · `Calcium_oxide` · `Calcium_perchlorate` · `Calcium_permanganate` · `Calcium_peroxide` · `Calcium_phosphate` · `Calcium_phosphide` · `Calcium_propanoate` · `Calcium_pyrophosphate` · `Calcium_selenide` · `Calcium_silicate` · `Calcium_stearate` · `Calcium_sulfate` · `Calcium_sulfide` · `Calcium_sulfite` · `Calcium_supplement` · `Calcium_titanate` · [[Californium]] · `Canada` · [[Carbon]] · `Carbon_cycle` · `Carbon_dioxide` · `Carbon_group` · `Carbonate` · 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[[Zirconium]] > **Official MAIN - Chemical element, Z = 20.** 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: Calcium](https://en.wikipedia.org/wiki/Calcium).  ## Key facts (infobox) | | | |---|---| | Symbol - Z | Ca - 20 | | Group - Period - Block | 2 - 4 - s-block | | Atomic weight (Da) | 40.078 | | Density (g/cm3) | 1.55 | | Melting - Boiling (K) | 1115 - 1757 | | Electronegativity (Pauling) | 1.00 | | Crustal abundance (mg/kg) | 41500 | | Origin | primordial | | Phase (STP) | solid | | Name origin | Latin calx, 'lime' | *Bracketed weights are the mass number of the most stable isotope; values in parentheses are predictions (per the source table).* ## Story Calcium was first isolated in 1808 by Sir Humphry Davy through the electrolysis of molten calcium chloride, following his discoveries of potassium and sodium the previous year. The element's name derives from the Latin *calx*, meaning lime or limestone, referencing calcium oxide and calcium carbonate compounds that have been essential to human construction and industry for millennia. Lime mortar, plaster, and whitewash—all calcium compounds—shaped the built environment long before anyone understood calcium's elemental nature. Calcium is the fifth most abundant element in Earth's crust by mass, typically found in limestone (calcium carbonate), gypsum (calcium sulfate), and feldspar minerals. Pure metallic calcium is a soft, reactive metal, but calcium compounds are ubiquitous and mild in reactivity. Calcium is the primary mineral component of bones and teeth in all vertebrate animals, where it provides structural support and enables the mechanical rigidity necessary for movement and skeletal function [model-prior - verify]. At the cellular level, calcium ions are essential signaling molecules involved in nerve transmission, muscle contraction, and hormone secretion. The element appears in limestone, chalk, marble, and Portland cement—materials that have literally built human civilization. Calcium is also essential in nutrition, present in milk, leafy greens, and fortified foods, with deficiency causing osteoporosis and developmental problems [model-prior - verify]. In this corpus, calcium anchors the **structural chemistry and skeletal biology narrative**—it illustrates how elemental chemistry becomes embodied in geological formations and living bodies alike, and how the same element serves both as mortar for buildings and mineral scaffold for life. ## 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 - External: [Limestone - en.wikipedia.org](https://en.wikipedia.org/wiki/Limestone) and rock formation - External: [Bone_structure - en.wikipedia.org](https://en.wikipedia.org/wiki/Bone#Composition) in vertebrate biology - SOLAR SYSTEM MINING SURVEYS - calcium-rich minerals in lunar samples and meteorites ## Vocational-Technical Semiotics The element speaks the canon's shared signs: the periodic table cell (Ca, group 2, 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: [[Potassium|Potassium (19)]] - [[Scandium|Scandium (21)]] - R.E.A.C.T.I.O.N. - Centers of Excellence ## Wikipedia : Wikitube **Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Calcium) : [Wikitube](https://en.wikitube.io/wiki/Calcium) ## Previous hub tags Tree parents: [[Helium]] · [[Hydrogen]] · [[Oxygen]]. Legacy hubs: none. --- *Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*