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sodium
Image: Wikimedia Commons

sodium

Chemical element with symbol Na and atomic number 11

Chemical elementchemical elementlithophile elementactive metalQ658

Also known as element 11 · 11Na

Symbol
Atomic number
Mass
Melting point
  • 97.78°C
Boiling point
  • 882.94°C
Density
  • 1,033.49 kg/m³
Discovered by
Discovered

Overview

All data

195 statements · 19% with external sources · numbers in brackets are citations

Oxidation state
  • 1
  • -1 statement is subject of: natride
  • 0
Subclass of
Canonical SMILES
  • [Na]
Electronegativity
  • 1
Location of discovery
Ionization energy
Radius
Found in taxon
Show 1 more
Different from
Standard molar entropy
Formula
  • Na
Part of
Unicode character
Electron configuration
  • 1s² 2s² 2p⁶ 3s¹
  • [Ne] 3s¹
Follows
Named after
Ionic radius
  • 0.99 ångström charge number: 1 · coordination number: 4
  • 1.02 ångström charge number: 1 · coordination number: 6
  • 1.18 ångström charge number: 1 · coordination number: 8
  • 1.24 ångström charge number: 1 · coordination number: 9
  • 1.39 ångström charge number: 1 · coordination number: 12
Made from material
Space group
Crystal system
Bulk modulus
  • 7.78B Pa
Shear modulus
  • 4.59B Pa
Poisson's ratio
  • 0.254
Thermal conductivity
  • 140 watt per metre kelvin
Electrical conductivity
  • 21M siemens per metre
Specific heat capacity
  • 1,230 joule per kilogram kelvin
Speed of sound
  • 3,200 m/s
Electrical resistivity
  • 4.77e-8 ohm metre
Point group
Standard enthalpy of formation
  • 107.5 kilojoule per mole state of matter: gas
  • 2.41 kilojoule per mole state of matter: liquid
Has characteristic
Linear thermal expansion coefficient
  • 69.91 micrometre per metre kelvin temperature: 20°C
Atomic radius
  • 180 picometre
Covalent radius
  • 166 picometre
Van der Waals radius
  • 227 picometre

On other databases

86 identifiers linking sodium across the web's reference databases