Sodium - Na

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General informations

Symbol Na
Atomic Number 11
Element Category (chemical set) Alkali Metal
Group 1
Period 3
Block s Shivaiah, V., Nagaraju, M., & Das, S. K. (2003). Formation of a Spiral-Shaped Inorganic−Organic Hybrid Chain, [CuII(2,2‘-bipy)(H2O)2Al(OH)6Mo6O18]nn-:  Influence of Intra- and Interchain Supramolecular Interactions. Inorganic Chemistry, 42(21), 6604–6606. https://doi.org/10.1021/ic034581f
Mohs Hardness
CAS Registry Number 7440-23-5 Baudler, M., Düster, D., Langerbeins, K., & Germeshausen, J. (1984). Na3P21 and Li3P21, the First Polyphosphides with Isolated P 213− Groups. Angewandte Chemie International Edition, 23(4), 317–318. http://onlinelibrary.wiley.com/doi/10.1002/anie.198403171/epdf
EINECS Registry Number 231-132-9

Physical Properties

Phase - - - Value - - - - - - - - - - - - - - Source - - - - - - - - - -
Melting Point 97,8 °C Page 260, Ashworth, P., & Chetland, J. (1991). Prospects for sodium metal applications. Speciality Chemicals: Innovations in Industrial Synthesis and Applications
Boiling Point 883°C Page 260, Ashworth, P., & Chetland, J. (1991). Prospects for sodium metal applications. Speciality Chemicals: Innovations in Industrial Synthesis and Applications
Density near Room Temperature 968 kg/m3 at 20°C Page 260, Ashworth, P., & Chetland, J. (1991). Prospects for sodium metal applications. Speciality Chemicals: Innovations in Industrial Synthesis and Applications
Density when Liquid at 100°C 928 kg/m3 at 100°C
Heat of Fusion
Heat of Vaporization
Molar Volume
Molar Heat Capacity
Vapor Pressure 1,19.10-3 mm Hg at 100°C Page 260, Ashworth, P., & Chetland, J. (1991). Prospects for sodium metal applications. Speciality Chemicals: Innovations in Industrial Synthesis and Applications
Oxidation State -1 ; +1 https://en.wikipedia.org/wiki/List_of_oxidation_states_of_the_elements
Speed of Sound
Thermal Expansion
Thermal Conductivity 140 W/m.°C at 20°C Page 260, Ashworth, P., & Chetland, J. (1991). Prospects for sodium metal applications. Speciality Chemicals: Innovations in Industrial Synthesis and Applications
Electrical Resistivity 4,69 μΩ at 20°C Page 260, Ashworth, P., & Chetland, J. (1991). Prospects for sodium metal applications. Speciality Chemicals: Innovations in Industrial Synthesis and Applications
Magnetic Ordering Paramagnetic
Young's Modulus
Shear Modulus
Bulk Modulus 6.9 GPa Miyake, T., Aryasetiawan, F., Kino, H., & Terakura, K. (2001). Total energy from the many-body perturbation approach with a model spectral function: An application to simple metals. Physical Review B, 64(23), 233109. https://doi.org/10.1103/PhysRevB.64.233109
Poisson Ratio
Electronegativity (Pauling scale) 0,9 Yin, S. Z. and G. L. and A. D. and T. W. and Q. (2006). Ferroelectric and piezoelectric properties of (Na, K) 0.5 Bi 0.5 TiO 3 lead free ceramics. Journal of Physics D: Applied Physics, 39(10), 2277. Retrieved from http://stacks.iop.org/0022-3727/39/i=10/a=042
Energy Gap (at 300K)
Dielectric Constant

Atomic Properties

Standard Atomic Weight 22,98976928 g/mol Küster, F. W. (2011). Rechentafeln für die chemische Analytik: Basiswissen für die analytische Chemie. Walter de Gruyter.
Atomic Radius 0,18570 nm Senkov, O. N., & Miracle, D. B. (2001). Effect of the atomic size distribution on glass forming ability of amorphous metallic alloys. Materials Research Bulletin, 36(12), 2183–2198. https://doi.org/https://doi.org/10.1016/S0025-5408(01)00715-2
Covalent Radius 1,9 A Van Hove, M. A. (1975). The potential profile in LEED theory. Surface Science, 48(2), 406–416. https://doi.org/https://doi.org/10.1016/0039-6028(75)90415-X
Van der Waals Radius 227 pm Bondi, A. (1964). van der Waals volumes and radii. The Journal of Physical Chemistry, 68(3), 441–451.
Electron Configuration [Ne] 3s1 Alajerami, Y. S. M., Hashim, S., Hassan, W. M. S. W., Ramli, A. T., & Saleh, M. A. (2013). The effect of MgO on the optical properties of lithium sodium borate doped with Cu+ ions. Optics and Spectroscopy, 114(4), 537–543. https://doi.org/10.1134/S0030400X1304022X
Electrons per Shell 2, 8, 1
Crystal Structure