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Also known as element 11, 11Na

عنصری با شمارهٔ اتمی ۱۱

OverviewAI-generated

Sodium is a chemical element with the symbol Na and atomic number 11. Its standard molar entropy is 51.2, and it has a mass of 22.98976928. The element exhibits oxidation states of -1, 1, and 0. Its electron configuration is described as 1s² 2s² 2p⁶ 3s¹ or [Ne] 3s¹.

The substance has an electronegativity of 1 and an ionization energy of 495.8. Its radius is 227, while its ionic radius is 1.39. Sodium melts at 97.78 and boils at 882.94. It was discovered in 1807. The canonical SMILES representation is [Na], and the Unicode character for the element is 鈉.

Synthesized by Vinony from 30 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: Na
Molecular weight: 22.9897693 g/mol
IUPAC name: sodium
SMILES: [Na]
InChIKey: KEAYESYHFKHZAL-UHFFFAOYSA-N
Polar surface area: 0 Å²
H-bond donors: 0
H-bond acceptors: 0
Formal charge: 0

via PubChem

Research

649,493 papers

Sodium's role and therapeutic targeting in cancer.ReviewTrends in pharmacological sciences · 2026An J, Zhang L, Duan Y et al.DOI: 10.1016/j.tips.2025.10.015
Sodium management in dialysis by conductivity.ReviewAdvances in renal replacement therapy · 1999Bosetto A, Bene B, Petitclerc TDOI: 10.1016/s1073-4449(99)70020-8
Sodium.Lancet (London, England) · 1951ROSENHEIM MLDOI: 10.1016/s0140-6736(51)93068-1
The seventh macronutrient: how sodium shortfall ramifies through populations, food webs and ecosystems.ReviewEcology letters · 2020Kaspari MDOI: 10.1111/ele.13517
Two barriers for sodium in vascular endothelium?ReviewAnnals of medicine · 2012Oberleithner HDOI: 10.3109/07853890.2011.653397
Optimization of dialysate sodium in sodium profiling haemodialysis.ReviewNephrology (Carlton, Vic.) · 2003Kim MJ, Song Jh, Kim Ga et al.DOI: 10.1046/j.1440-1797.8.s.2.x
Peroperative sodium balance.Acta anaesthesiologica Scandinavica · 1971Deding A, Jorgensen S, Nielsen FHDOI: 10.1111/j.1399-6576.1971.tb00636.x
Sodium gradient: a tool to individualize dialysate sodium prescription in chronic hemodialysis patients?ReviewBlood purification · 2011Penne EL, Sergeyeva ODOI: 10.1159/000321851

Wikidata facts

Subclass of: s-block
Part of: alkali metal
Named after: natron
Follows: neon
Material used: albite
Radius: 180
Mass: 22.98976928
Image: Na (Sodium).jpg

Show 20 more facts

element symbol: Na
oxidation state: 0
Commons category: Sodium
topic's main category: Category:Sodium
atomic number: 11
Commons gallery: Sodium
discoverer or inventor: Humphry Davy
time of discovery or invention: 1807-00-00
canonical SMILES: [Na]
electronegativity: 1
location of discovery: United Kingdom
ionization energy: 5.14
standard molar entropy: 51.2
chemical formula: Na
Unicode character: 鈉
electron configuration: [Ne] 3s¹
ionic radius: 1.39
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4
melting point: 97.78
boiling point: 882.94

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