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Also known as Sr, element 38, 38Sr

Strontium is a chemical element; it has symbol Sr and atomic number 38. An alkaline earth metal, it is a soft silver-white yellowish metallic element that is highly chemically reactive. The metal forms a dark oxide layer when it is exposed to air. Strontium has physical and chemical properties similar to those of its two vertical neighbors in the periodic table, calcium and barium. It occurs naturally mainly in the minerals celestine and strontianite, and is mostly mined from these.

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Strontium is a chemical element with the symbol Sr and atomic number 38. Its standard atomic weight is 87.62. The element has an electron configuration of [Kr] 5s² and typically exhibits an oxidation state of 2. It has an electronegativity of 1 and an ionic radius of 1.44.

The element was discovered in 1787. Its chemical formula is Sr. The Unicode character for strontium is 鍶. In chemical databases, it is identified by the InChIKey CIOAGBVUUVVLOB-UHFFFAOYSA-N and has a topological polar surface area of 0. It has zero hydrogen bond donors and acceptors, and a charge of 0. The MCN code for the substance is 2805.19.10.

Synthesized by Vinony from 26 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: Sr
Molecular weight: 87.62 g/mol
IUPAC name: strontium
SMILES: [Sr]
InChIKey: CIOAGBVUUVVLOB-UHFFFAOYSA-N
Polar surface area: 0 Å²
H-bond donors: 0
H-bond acceptors: 0
Formal charge: 0

via PubChem

Research

18,576 papers

Advances in strontium-releasing biomaterials for bone repair.ReviewBiomaterials · 2026Mehta D, Gentleman EDOI: 10.1016/j.biomaterials.2025.123718
Strontium overload and toxicity: impact on renal osteodystrophy.ReviewNephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association · 2002Cohen-Solal MDOI: 10.1093/ndt/17.suppl_2.30
The biological role of strontium.ReviewBone · 2004Pors Nielsen SDOI: 10.1016/j.bone.2004.04.026
Strontium in the environment: Review about reactions of plants towards stable and radioactive strontium isotopes.ReviewThe Science of the total environment · 2019Burger A, Lichtscheidl IDOI: 10.1016/j.scitotenv.2018.10.312
Strontium-releasing fluorapatite glass-ceramics: Crystallization behavior, microstructure, and solubility.Journal of biomedical materials research. Part B, Applied biomaterials · 2018Denry I, Goudouri OM, Harless JD et al.DOI: 10.1002/jbm.b.33945
Strontium-90 in man.Science (New York, N.Y.) · 1957ECKELMANN WR, KULP JL, SCHULERT ARDOI: 10.1126/science.125.3241.219
Strontium-90 in Alaska.Science (New York, N.Y.) · 1962SCHULERT ARDOI: 10.1126/science.136.3511.146
Strontium Ranelate and Strontium Chloride Supplementation Influence on Bone Microarchitecture and Bone Turnover Markers-A Preliminary Study.Nutrients · 2023Turżańska K, Tomczyk-Warunek A, Dobrzyński M et al.DOI: 10.3390/nu16010091

Wikidata facts

Instance of: lithophile
Part of: alkaline earth metal
Named after: Strontian
Mass: 87.62
Image: Strontium destilled crystals.jpg

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atomic number: 38
element symbol: Sr
Commons category: Strontium
topic's main category: Category:Strontium
MCN code: 2805.19.10
Commons gallery: Strontium
described by source: Encyclopædia Britannica 11th edition
topic has template: Template:Infobox strontium
canonical SMILES: [Sr]
chemical formula: Sr
Unicode character: 鍶
time of discovery or invention: 1787-00-00
electronegativity: 1
discoverer or inventor: William Cruickshank
location of discovery: United Kingdom
found in taxon: Foeniculum vulgare
ionic radius: 1.44
electron configuration: [Kr] 5s²
oxidation state: 2

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