Radium - Wikiparency

# Radium ## 🧊 Radium · 3D (three.js) <iframe src="https://wikitube-elements.netlify.app/?el=Ra&embed=1" width="100%" height="620" frameborder="0" style="border:0;border-radius:12px;overflow:hidden" allowfullscreen loading="lazy" title="The Elements 3D microsim - Radium"></iframe> *Radium 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=Ra)  !Radium plate.svg *Plate 88 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.* - [[Radioactive_decay|Radioactive decay]] - alpha emission and radium-222 radon gas - [[Half-life|Half-life]] - radium-226 at 1600 years and radiometric dating - Radioluminescence - the glow of radium and its use in watch dials - Radium poisoning - bone accumulation and cancer from historical exposures ## Links (Wikipedia order)  `20-złoty_note` · [[Actinium]] · `Actinium-225` · `Airman` · `Alkali_metal` · `Alkaline_earth_metal` · [[Alpha_decay]] · [[Alpha_particle]] · `Altimeter` · [[Aluminium]] · `Amalgam_(chemistry)` · [[Americium]] · `Americium-241` · `Ammonia` · `Amount_of_substance` · `André-Louis_Debierne` · `Anemia` · [[Antimony]] · `Aplastic_anemia` · `Aqueous_solution` · [[Argon]] · [[Arsenic]] · [[Astatine]] · `Atomic,_molecular,_and_optical_physics` · `Atomic_clock` · `Atomic_number` · `Austria` · `Austria-Hungary` · `Azide` · [[Barium]] · `Barium_chloride` · `Barium_hydroxide` · `Barium_sulfate` · `Barotrauma` · `Base_(chemistry)` · `Belgium` 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`Uranium-238` · `Vacuum_tube` · `Van_der_Waals_radius` · [[Vanadium]] · `Vapor_pressure` · `Vassar_College` · `Volatility_(chemistry)` · `Volt` · `Washington_and_Lee_University` · [[Wayback_Machine]] · `Wiley-VCH` · `World_Health_Organization` · `World_War_I` · `World_War_II` · `Władysław_Skłodowski` · [[Xenon]] · `Young_Einstein` · [[Ytterbium]] · [[Yttrium]] · `Zaire` · [[Zinc]] · `Zinc_sulfide` · [[Zirconium]] · `Ève_Curie` > **Official MAIN - Chemical element, Z = 88.** 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: Radium](https://en.wikipedia.org/wiki/Radium).  ## Key facts (infobox) | | | |---|---| | Symbol - Z | Ra - 88 | | Group - Period - Block | 2 - 7 - s-block | | Atomic weight (Da) | [226] | | Density (g/cm3) | 5.5 | | Melting - Boiling (K) | 973 - 2010 | | Electronegativity (Pauling) | 0.9 | | Crustal abundance (mg/kg) | 9e-7 | | Origin | from decay | | Phase (STP) | solid | | Name origin | Latin radius, 'ray' (the Curies) | *Bracketed weights are the mass number of the most stable isotope; values in parentheses are predictions (per the source table).* ## Story Radium was discovered in 1898 by Marie and Pierre Curie while processing tons of pitchblende ore to isolate the radioactive elements they had detected. They named it from the Latin *radius*, meaning "ray," to emphasize its glowing radioactivity. Radium-226, the most stable isotope, has a half-life of 1,600 years. The discovery of radium was instrumental in establishing the new field of nuclear physics and earned the Curies the Nobel Prize in Physics in 1903 (and Marie a second Nobel Prize in Chemistry in 1911 for the discovery of radium and polonium). Radium is a highly radioactive alkaline earth metal. It glows visibly in the dark due to its intense radioactivity exciting the atoms in its vicinity. In the early 20th century, this captivating property led to widespread use in consumer products—luminous watch dials, cosmetics, and medical treatments—before the severe health dangers became apparent. Radium accumulates in bone and causes cancer and anemia. [model-prior - verify] Today, radium is used only in specialized applications such as static eliminators and certain medical treatments. In this corpus, radium is inseparable from the Curie legacy and from the radioactive-series framework—it is a linchpin of both the uranium-238 and actinium-235 decay chains. Radium's journey from "wonder element" to understood carcinogen mirrors the broader narrative of scientific discovery meeting occupational and public-health reality. ## Corpus connections Radium is the Curies' signature element and a major node in the uranium and thorium decay chains. Its alpha decay produces radon, which seeps into buildings as a health hazard. - 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 - [Marie Curie](https://en.wikipedia.org/wiki/Marie_Curie) - discoverer of radium, twice Nobel laureate, pioneer of radioactivity - [Decay chain](https://en.wikipedia.org/wiki/Decay_chain) - radium-226 in the uranium-238 series, radium-228 in the thorium-232 series ## Vocational-Technical Semiotics The element speaks the canon's shared signs: the periodic table cell (Ra, group 2, 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: [[Francium|Francium (87)]] - [[Actinium|Actinium (89)]] - R.E.A.C.T.I.O.N. - Centers of Excellence ## Wikipedia : Wikitube **Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Radium) : [Wikitube](https://en.wikitube.io/wiki/Radium) ## Previous hub tags Tree parents: [[Helium]] · [[Hydrogen]] · [[Oxygen]]. Legacy hubs: none. --- *Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*