Template:Infobox sodium

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Sodium,  11Na
Template:Infobox element/symbol-to-top-image-alt
General properties
PronunciationTemplate:Infobox element/pronunciation
Appearancesilvery white metallic
Standard atomic weight (Ar, standard)Template:Infobox element/standard atomic weight
Mass numberTemplate:Infobox element/symbol-to-most-stable-isotope (most stable isotope)
Sodium in the periodic table
Template:Infobox element/periodic table
Atomic number (Z)11
GroupTemplate:Infobox element/group
Periodperiod 3
Blocks-block
Element categoryTemplate:Infobox element/category format
Electron configuration[Ne] 3s1
Electrons per shell
2, 8, 1
Physical properties
Phase at STPsolid
Melting point370.944 K ​(97.794 °C, ​208.029 °F)
Boiling point1156.090 K ​(882.940 °C, ​1621.292 °F)
Density (near r.t.)0.968 g/cm3
when liquid (at m.p.)0.927 g/cm3
Critical point2573 K, 35 MPa (extrapolated)
Heat of fusion2.60 kJ/mol
[[Enthalpy of vaporization|Heat of Template:Engvar]]97.42 kJ/mol
Molar heat capacity28.230 J/(mol·K)
[[Vapor pressure|Template:Engvar pressure]]
Atomic properties
Oxidation statesTemplate:Infobox element/symbol-to-oxidation-state
ElectronegativityPauling scale: 0.93
[[Ionization energy|Template:Engvar energies]]
  • 1st: 495.8 kJ/mol
  • 2nd: 4562 kJ/mol
  • 3rd: 6910.3 kJ/mol
  • (more)
Atomic radiusempirical: 186 pm
Covalent radius166±9 pm
Van der Waals radius227 pm
Template:Infobox element/spectral lines
Other properties
Crystal structureTemplate:Infobox element/crystal structure
Speed of sound thin rod3200 m/s (at 20 °C)
Thermal expansion71 µm/(m·K) (at 25 °C)
Thermal conductivity142 W/(m·K)
Electrical resistivity47.7 nΩ·m (at 20 °C)
Magnetic orderingparamagnetic[1]
Magnetic susceptibility+16.0·10−6 cm3/mol (298 K)[2]
Young's modulus10 GPa
Shear modulus3.3 GPa
Bulk modulus6.3 GPa
Mohs hardness0.5
Brinell hardness0.69 MPa
CAS Number7440-23-5
History
Discovery and first isolationHumphry Davy (1807)
Main isotopes of sodium
Template:Infobox element/isotopes table
| references

Template:Infobox element/element navigation Template:Template reference list One of these is a named reference. It may be cited in the containing article as

  • <ref name="CIAAW2016" /> for the source Atomic weights of the elements 2013 (from subtemplates used by {{Infobox element}})

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  1. Magnetic susceptibility of the elements and inorganic compounds, in Template:RubberBible86th
  2. Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.