Atomic symbol: Na
Atomic number: 11
Atomic weight: 22.98977 u
Isotopes and abundances: 23Na 100 %
1 Atm melting point: 97.7 °C
1 Atm boiling point: 883 °C
Common valences: 1+
Ionic radii: 110 pm
Pauling electronegativity: 0.93
First ionization energy: 496 kJ.mol−1
Chondritic (CI) abundance: 4962 ppm
Silicate earth abundance: 2590 ppm
Crustal abundance: 2.3 %
Seawater abundance: 0.47 mol/kg
Core abundance: ~0
Properties
Sodium (Na) is an alkali metal belonging to the first column of the periodic table. Like the other alkali metals (Li, K, Rb, Cs, Fr), it is a highly reactive element that does not exist in a metallic form on Earth. It easily loses an electron and combines mostly with oxygen and halogens. Its electronic configuration is [Ne] 3s1 and its ionic radius is 1.1 Angstrom making Na+ one of the largest cations.
It is mainly found in silicates, chlorides, or as the free ion Na+in surface fluids. It is particularly enriched in seawater as a result of its...
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References
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Gaillardet, J. (2016). Sodium. In: White, W. (eds) Encyclopedia of Geochemistry. Encyclopedia of Earth Sciences Series. Springer, Cham. https://doi.org/10.1007/978-3-319-39193-9_240-2
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DOI: https://doi.org/10.1007/978-3-319-39193-9_240-2
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