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Sodium

Metalsolid
Symbol: Na
Atomic number: 11
Atomic mass: 22.989768
Group: Alkali Metal
CAS-number: 7440-23-5

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Physical data
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Physical data

Electronic dataThermal dataSteric data
Shells: 2, 8, 1
Orbitals: [Ne] 3s1
Electronegativity: 0.9, 1.0
1. Ionization potential: 5.1391 eV
2. Ionization potential: 47.286 eV
3. Ionization potential: 71.641 eV
Oxidation states: 1
Electrical conductivity: 0.210 10^6
Melting point: 97.81 °C
Boiling point: 882.9 °C
Specific heat: 1.23 J/gK
Heat of fusion: 2.598 kJ/mol
Heat of vaporization: 96.960 kJ/mol
Thermal conductivity: 1.41 W/cmK
Atomic radius: 2.23 Å
Ionic radius: 1.02 Å (+1)
Covalent radius: 1.54 Å
Atomic volume: 23.7 cm³/mol
Density (293 K): 0.971 g/cm³
Crystal structure: cubic body centered
cubic body centered

Isotopes

NuclideAbundance [%]MassSpinHalflifeDecay modeDecay tree
22Na 0 21.9944 3 2.605y β+, EC View
23Na 100 22.9898 3/2 -- --
24Na 0 23.9909 4 14.96h β- View

Other info

Name origin:Medieval Latin: sodanum, (headache remedy); symbol from Latin natrium, (sodium carbonate)
Description:Soft silvery-white metal. Sixth most abundant element in the earth's crust. Burns in air with a brilliant white flame.
Discovered by:Sir Humphrey Davy
Year:1807
Place:England
Sources:Obtained by electrolysis of melted sodium chloride (salt), borax and cryolite.
Use(s):There are few uses for the pure metal, however its compounds are used in medicine, agriculture and photography. Sodium chloride (NaCl) is table salt. Liquid sodium is sometimes used to cool nuclear reactors.