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رادیم

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Also known as Ra, element 88, 88Ra

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OverviewAI-generated

Radium is a chemical element with the symbol Ra and atomic number 88. Its chemical formula is Ra, and it is represented by the Unicode character 鐳. The element has an electronegativity of 0.9 and an ionic radius of 1.70. Its electron configuration is [Rn] 7s², and its common oxidation state is 2.

Radium was discovered in 1898. The canonical SMILES representation for the element is [Ra]. The IUPAC name is radium, and its molecular weight is 226.02541. It has a charge of 0, with 0 hydrogen bond donors and acceptors, and a topological polar surface area of 0.

Synthesized by Vinony from 24 facts across 4 sources: Wikidata, PubChem, PubMed, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.

Chemical data

Formula: Ra
Molecular weight: 226.02541 g/mol
IUPAC name: radium
SMILES: [Ra]
InChIKey: HCWPIIXVSYCSAN-UHFFFAOYSA-N
Polar surface area: 0 Å²
H-bond donors: 0
H-bond acceptors: 0
Formal charge: 0

via PubChem

Research

22,682 papers

Review of Radium-223 and Metastatic Castration-Sensitive Prostate Cancer.ReviewCancer biotherapy & radiopharmaceuticals · 2020Dandapani SV, Wong J, Twardowski PDOI: 10.1089/cbr.2019.3493
Radium brachytherapy a predecessor to modern brachytherapy: A historical review from an Indian perspective.ReviewJournal of cancer research and therapeutics · 2025Thayalan K, Ravichandran RDOI: 10.4103/jcrt.jcrt_945_24
Radium-223 dichloride: a review of its use in patients with castration-resistant prostate cancer with symptomatic bone metastases.ReviewDrugs · 2014Shirley M, McCormack PLDOI: 10.1007/s40265-014-0198-4
Radium.Journal of the American Medical Association · 1946DESJARDINS AU, WILLIAMS MM
Radium accidents.The American journal of roentgenology, radium therapy, and nuclear medicine · 1960KRABBENHOFT KL
Radium toxicity.Postgraduate medicine · 1952FISHBEIN M
Malignancy from radium.British journal of cancer · 1970Loutit JFDOI: 10.1038/bjc.1970.23
Radium recovery from mining tailings: A comprehensive review of techniques and applications.ReviewJournal of environmental radioactivity · 2026Galvis OCG, Goulart de Araujo L, Vicente R et al.DOI: 10.1016/j.jenvrad.2026.108010

Wikidata facts

Instance of: chemical element
Part of: period 7
Named after: radioactivity
Image: Radium226.jpg

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described by source: Encyclopædia Britannica 11th edition
Commons gallery: Radium
Unicode character: 鐳
element symbol: Ra
discoverer or inventor: Pierre Curie
Commons category: Radium
topic's main category: Category:Radium
atomic number: 88
canonical SMILES: [Ra]
chemical formula: Ra
time of discovery or invention: 1898-00-00
electronegativity: 0.9
different from: Rad
ionic radius: 1.70
electron configuration: [Rn] 7s²
oxidation state: 2
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4

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