Chromium - Wikiparency

# Chromium ## 🧊 Chromium · 3D (three.js) <iframe src="https://wikitube-elements.netlify.app/?el=Cr&embed=1" width="100%" height="620" frameborder="0" style="border:0;border-radius:12px;overflow:hidden" allowfullscreen loading="lazy" title="The Elements 3D microsim - Chromium"></iframe> *Chromium 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=Cr)  !Chromium plate.svg *Plate 24 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.* - Stainless steel - chromium's role in corrosion resistance - Chromite ore - extraction and metallurgy - Chrome plating - electrodeposition and surface finishing ## Links (Wikipedia order)  `(Benzene)chromium_tricarbonyl` · `Abundance_of_elements_in_Earth's_crust` · [[Actinium]] · `Aerospace` · `Alkali_metal` · `Alkaline_earth_metal` · `Alum` · [[Aluminium]] · `Aluminium-26` · `Aluminothermic_reaction` · `American_Iron_and_Steel_Institute` · [[Americium]] · `Amphoterism` · `Ancient_Greek` · `Anisotropy` · `Anodizing` · `Antiferromagnetism` · [[Antimony]] · [[Argon]] · [[Arsenic]] · [[Astatine]] · `Atomic_diffusion` · `Atomic_number` · `Atomic_radius` · `Aufbau_principle` · `Baltimore` · `Bangladesh` · [[Barium]] · [[Berkelium]] · `Bert_Weckhuysen` · [[Beryllium]] · `Beryozovskoye_deposit` · [[Beta_decay]] · `Bis(benzene)chromium` · [[Bismuth]] · `Blast_furnace` · `Block_(periodic_table)` · `Bloomberg_L.P.` · [[Bohrium]] · [[Boiling_point]] · [[Boron]] · `Boron_group` · `Brazil` · `Brick` · `Brinell_hardness_test` · [[Bromine]] · `Bulk_modulus` · `Bursa` · `CAS_Registry_Number` · [[Cadmium]] · [[Caesium]] · [[Calcium]] · `Calcium_carbonate` · [[Californium]] · [[Carbon]] · `Carbon_group` · `Centers_for_Disease_Control_and_Prevention` · [[Cerium]] · `Chalcogen` · [[Chemical_element]] · `Chemical_industry` · [[Chlorine]] · `Chromate_and_dichromate` · `Chromate_conversion_coating` · `Chromated_copper_arsenate` · `Chrome_alum` · `Chrome_plating` · `Chrome_yellow` · `Chromic_acid` · `Chromite` · `Chromium(I)_hydride` · `Chromium(II)_acetate` · `Chromium(II)_bromide` · `Chromium(II)_carbide` · `Chromium(II)_chloride` · `Chromium(II)_fluoride` · `Chromium(II)_hydride` · `Chromium(II)_iodide` · `Chromium(II)_oxalate` · `Chromium(II)_oxide` · `Chromium(II)_selenide` · `Chromium(II)_silicide` · `Chromium(II)_sulfate` · `Chromium(II)_sulfide` · `Chromium(III)_acetate` · `Chromium(III)_boride` · `Chromium(III)_bromide` · `Chromium(III)_chloride` · `Chromium(III)_fluoride` · `Chromium(III)_hydroxide` · `Chromium(III)_iodide` · `Chromium(III)_oxide` · `Chromium(III)_perchlorate` · `Chromium(III)_phosphate` · `Chromium(III)_picolinate` · `Chromium(III)_sulfate` · `Chromium(III)_sulfide` · `Chromium(III)_telluride` · `Chromium(IV)_bromide` · `Chromium(IV)_chloride` · `Chromium(IV)_fluoride` · `Chromium(IV)_oxide` · `Chromium(IV)_silicide` · `Chromium(VI)_oxide_peroxide` · `Chromium_(disambiguation)` · `Chromium_compounds` · `Chromium_deficiency` · `Chromium_hexacarbonyl` · `Chromium_hexafluoride` · `Chromium_nitride` · `Chromium_oxytetrafluoride` · `Chromium_pentafluoride` · `Chromium_toxicity` · `Chromium_trioxide` · `Chromocene` · `Chromyl_chloride` · `Chromyl_fluoride` · [[Cobalt]] · `Coercivity` · `Collagen` · `Color` · `Commission_on_Isotopic_Abundances_and_Atomic_Weights` · `Contact_dermatitis` · `Coordination_sphere` · [[Copernicium]] · [[Copper]] · `Copper_chromite` · [[Corrosion]] · `Corundum` · `Corundum_(structure)` · `Covalent_radius` · `Crocoite` · [[Crystal_structure]] · [[Cubic_crystal_system]] · `Cultivar` · [[Curium]] · `Cyclopentadienyl` · `Cyclopentadienylchromium_tricarbonyl_dimer` · `Cytochrome` · `Cytochrome_c` · `DNA` · [[Darmstadtium]] · [[Decay_product]] · [[Density]] · `Deutsche_Post` · `Diamond` · `Dietary_Reference_Intake` · `Dietary_supplement` · [[Dubnium]] · `Dye` · [[Dysprosium]] · [[Einsteinium]] · `Electric_arc_furnace` · `Electrical_resistivity_and_conductivity` · `Electron_capture` · `Electron_configuration` · `Electronegativity` · `Electroplating` · `Embrittlement` · `Emerald` · `Enthalpy_of_fusion` · `Enthalpy_of_vaporization` · `Environmental_Working_Group` · `Environmental_remediation` · [[Erbium]] · `Erosion` · `European_Chemicals_Agency` · `European_Food_Safety_Authority` · [[Europium]] · `F._Albert_Cotton` · [[Fermium]] · `Ferrochrome` · `Finland` · [[Flerovium]] · [[Fluorine]] · `Foundry` · [[Francium]] · [[Gadolinium]] · [[Gallium]] · `Gemstone` · `Genotoxicity` · [[Germanium]] · `Glycated_hemoglobin` · [[Gold]] · `Groundwater` · `Group_(periodic_table)` · `Group_10_element` · `Group_11_element` · `Group_12_element` · `Group_3_element` · `Group_4_element` · `Group_5_element` · `Group_6_element` · `Group_7_element` · `Group_8_element` · `Group_9_element` · [[Hafnium]] · [[Half-life]] · `Halogen` · `Hardness` · [[Hassium]] · [[Helium]] · `Hemolysis` · `Hexavalent_chromium` · `High-speed_steel` · `History_of_China` · [[Holmium]] · `Hydrochloric_acid` · [[Hydrogen]] · `Hydrogen_embrittlement` · `Hydrogen_peroxide` · `Hydrogenation` · `Hydroxyl_radical` · `Incoloy` · `Inconel` · `India` · [[Indium]] · `Infrared` · `Insulin` · [[Iodine]] · `Ionization` · [[Ionization_energy]] · [[Iridium]] · [[Iron]] · `Isotope` · `Isotopes_of_chromium` · `Jet_engine` · `Kazakhstan` · `Keggin_structure` · `Kelvin` · `Kiln` · `Kimberlite` · [[Krypton]] · `Lacquer` · [[Lanthanum]] · `Laser` · `Lattice_constant` · [[Lawrencium]] · `Leaching_(metallurgy)` · [[Lead]] · `Lead(II)_hydroxide` · `Leather` · `Lightfastness` · `List_of_chemical_element_name_etymologies` · `List_of_data_references_for_chemical_elements` · [[Lithium]] · [[Livermorium]] · `Louis_Nicolas_Vauquelin` · `Low-molecular-weight_chromium-binding_substance` · [[Lutetium]] · [[Magnesium]] · `Magnetic_susceptibility` · `Magnetic_tape` · `Magnetism` · [[Manganese]] · `Mary_Elvira_Weeks` · `Maxwell's_equations` · `Mechanism_of_action` · [[Meitnerium]] · `Melting_point` · [[Mendelevium]] · [[Mercury_(element)]] · `Meta-analysis` · `Metal` · `Metallic_bonding` · `Micrometre` · `Mineral_(nutrient)` · `Molar_heat_capacity` · `Molar_ionization_energies_of_the_elements` · [[Molybdenum]] · `Mordant` · [[Moscovium]] · `Mouth` · `Mutagen` · `National_Academy_of_Medicine` · `National_Geographic_Society` · `National_Institute_for_Occupational_Safety_and_Health` · `Native_metal` · `Natural_abundance` · `Nazi_Germany` · [[Neodymium]] · [[Neon]] · [[Neptunium]] · `Newsweek` · `Nichrome` · [[Nickel]] · [[Nihonium]] · [[Niobium]] · `Nitric_acid` · [[Nitrogen]] · [[Nobelium]] · [[Noble_gas]] · `Norman,_Oklahoma` · `Norman_Greenwood` · `Nuclear_isomer` · [[Nucleosynthesis]] · `Nutrient` · `Occupational_Safety_and_Health_Administration` · `Octahedral_molecular_geometry` · [[Oganesson]] · `Ohm` · `Ore` · `Organic_Syntheses` · `Organochromium_chemistry` · [[Osmium]] · `Oxidation_state` · `Oxidizing_acid` · `Oxyanion` · [[Oxygen]] · `PH` · `Paint` · [[Palladium]] · `Passivation_(chemistry)` · `Pearson_symbol` · `Period_(periodic_table)` · `Period_1_element` · `Period_2_element` · `Period_3_element` · `Period_4_element` · `Period_5_element` · `Period_6_element` · `Period_7_element` · `Periodic_table` · `Permissible_exposure_limit` · `Peter_Simon_Pallas` · `Phase_(matter)` · `Phillips_catalyst` · `Phosphate` · [[Phosphorus]] · `Picometre` · `Pigment` · [[Platinum]] · [[Plutonium]] · `Pnictogen` · `Poisson's_ratio` · `Polishing` · [[Polonium]] · `Polyethylene` · `Polyvinyl_butyral` · [[Potassium]] · `Potassium_chromate` · `Potassium_dichromate` · `Potassium_tetraperoxochromate(V)` · `Pourbaix_diagram` · [[Praseodymium]] · `Primer_(paint)` · `Primordial_nuclide` · [[Promethium]] · [[Protactinium]] · `Prussian_blue` · `Pyridinium_chlorochromate` · `Quadruple_bond` · `Quartz` · `Quintuple_bond` · [[Radioactive_decay]] · [[Radium]] · [[Radon]] · `Reagent` · `Recommended_exposure_limit` · `Redox` · `Reducing_agent` · `Reference_Daily_Intake` · `Refractory` · `Relative_permittivity` · [[Rhenium]] · [[Rhodium]] · `Roasting_(metallurgy)` · `Robert_A._Schoonheydt` · [[Roentgenium]] · [[Rubidium]] · `Ruby` · `Rust` · [[Ruthenium]] · [[Rutherfordium]] · [[Samarium]] · `Sapphire` · [[Scandium]] · [[Seaborgium]] · [[Selenium]] · `Shear_modulus` · [[Silicon]] · `Silicothermic_reaction` · [[Silver]] · [[Sodium]] · `Sodium_carbonate` · `Sodium_chromate` · `Sodium_dichromate` · `Solar_System` · `Solid` · `South_Africa` · `Specific_heat_capacity` · `Spectral_line` · `Specular_reflection` · `Speed_of_sound` · `Spin_density_wave` · `Stainless_steel` · `Standard_atomic_weight` · `Standard_temperature_and_pressure` · `Stimulated_emission` · `Strategic_material` · [[Strontium]] · `Sulfate` · [[Sulfur]] · `Sulfuric_acid` · `Superalloy` · `Synthetic_radioisotope` · `Systematic_review` · `Tanning_(leather)` · [[Tantalum]] · `Tarnish` · [[Technetium]] · [[Tellurium]] · [[Tennessine]] · [[Terbium]] · `Tetrahedral_molecular_geometry` · [[Thallium]] · [[Thorium]] · [[Thulium]] · `Timeline_of_chemical_element_discoveries` · [[Tin]] · [[Titanium]] · `Topaz` · `Toxicity` · `Transition_metal` · `Transport_protein` · [[Tungsten]] · `Turkey` · `United_States` · `Ural_Mountains` · [[Uranium]] · [[Vanadium]] · `Vapor_pressure` · `Vickers_hardness_test` · `Visible_spectrum` · [[Wayback_Machine]] · `X-ray_diffraction` · [[Xenon]] · `Yahoo_News` · `Yeast` · `Young's_modulus` · [[Ytterbium]] · [[Yttrium]] · `Zimbabwe` · [[Zinc]] · `Zinc_chromate` · [[Zirconium]] · `Zone_melting` > **Official MAIN - Chemical element, Z = 24.** 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: Chromium](https://en.wikipedia.org/wiki/Chromium).  ## Key facts (infobox) | | | |---|---| | Symbol - Z | Cr - 24 | | Group - Period - Block | 6 - 4 - d-block | | Atomic weight (Da) | 51.996 | | Density (g/cm3) | 7.15 | | Melting - Boiling (K) | 2180 - 2944 | | Electronegativity (Pauling) | 1.66 | | Crustal abundance (mg/kg) | 102 | | Origin | primordial | | Phase (STP) | solid | | Name origin | Greek chroma, 'colour' | *Bracketed weights are the mass number of the most stable isotope; values in parentheses are predictions (per the source table).* ## Story Chromium was discovered in 1797 by French chemist Louis-Nicolas Vauquelin in a red mineral called crocoite (lead chromate), found in the Ural Mountains of Russia. Vauquelin named it "chromium" from the Greek word "chroma," meaning colour, because chromium compounds display a striking variety of colours—yellow, orange, red, green, and blue depending on oxidation state and chemical environment [model-prior - verify]. For nearly a century, chromium remained a laboratory curiosity until industrial demand for chrome plating and stainless steel emerged in the late 19th century. Chromium is a hard, lustrous, silvery-white transition metal with high melting point and exceptional corrosion resistance. It does not occur naturally in pure form; the principal ore is chromite (FeCr₂O₄), which contains iron and chromium oxides. The vast majority of chromium production (roughly 90 percent) is used to manufacture stainless steel, where even small percentages of chromium dramatically improve corrosion resistance and durability [model-prior - verify]. Chromium is also used in chrome plating, leather tanning, pigments, and catalysts. In the corpus, chromium exemplifies the periodic table's principle of structural organization: it marks the transition point in period 4 where the d-block begins to fill completely, sitting between the vanadium and manganese groups. Its role in stainless steel connects it to both the industrial history of Minnesota mining and to the advanced materials science that underlies the Technate's infrastructure layer. ## 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 - Technate Expansion schema - chromium's critical role in stainless steel and advanced materials ## Vocational-Technical Semiotics The element speaks the canon's shared signs: the periodic table cell (Cr, group 6, 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: [[Vanadium|Vanadium (23)]] - [[Manganese|Manganese (25)]] - R.E.A.C.T.I.O.N. - Centers of Excellence ## Wikipedia : Wikitube **Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Chromium) : [Wikitube](https://en.wikitube.io/wiki/Chromium) ## Previous hub tags Tree parents: [[Helium]] · [[Hydrogen]] · [[Oxygen]]. Legacy hubs: none. --- *Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*