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Sodium,  11Na
Na (Sodium).jpg
General properties
Appearancesillery white metallic
Staundart atomic wecht (Ar, staundart)22.98976928(2)[1]
Sodium in the periodic cairt
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Airn Cobalt Nickel Capper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Siller (element) Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gowd Mercur (element) Thallium Leid (element) Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium
Li

Na

K
neonsodiummagnesium
Atomic nummer (Z)11
Groupgroup 1 (alkali metals)
Periodperiod 3
Element category  alkali metal
Blocks-block
Electron confeeguration[Ne] 3s1
Electrons per shell
2,8,1
Pheesical properties
Phase (at STP)solit
Meltin pynt370.944 K ​(97.794 °C, ​208.029 °F)
Bylin pynt1156.090 K ​(882.940 °C, ​1621.292 °F)
Density (near r.t.)0.968 g/cm3
when liquid (at m.p.)0.927 g/cm3
Creetical pynt(extrapolatit)
2573 K, 35 MPa
Heat o fusion2.60 kJ/mol
Heat o vapourisation97.42 kJ/mol
Molar heat capacity28.230 J/(mol·K)
Vapour pressur
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 554 617 697 802 946 1153
Atomic properties
Oxidation states1, −1 ​strangly basic oxide
ElectronegativityPauling scale: 0.93
Ionisation energies
Atomic radiusempirical: 186 pm
Covalent radius166±9 pm
Van der Waals radius227 pm
Coloyr lines in a spectral range
Spectral lines o Infobox sodium
Miscellanea
Creestal structurbody-centred cubic (bcc)
Body-centered cubic creestal structur for sodium
Speed o soond thin rod3200 m/s (at 20 °C)
Thermal expansion71 µm/(m·K) (at 25 °C)
Thermal conductivity142 W/(m·K)
Electrical resistivity47.7 n Ω·m (at 20 °C)
Magnetic orderinparamagnetic[2]
Young's modulus10 GPa
Shear modulus3.3 GPa
Bouk modulus6.3 GPa
Mohs haurdness0.5
Brinell haurdness0.69 MPa
CAS Nummer7440-23-5
History
DiskiveryHumphry Davy (1807)
First isolationHumphry Davy (1807)
Main isotopes o sodium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct
22Na trace 2.602 y β+γ 0.5454 22Ne*
1.27453(2)[3] 22Ne
εγ - 22Ne*
1.27453(2) 22Ne
β+ 1.8200 22Ne
23Na 100% stable
* = excited state
| references | in Wikidata

References

Thir references will appear in the airticle, but this list appears anerly on this page.
  1. Meija, J.; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 265–91. doi:10.1515/pac-2015-0305. 
  2. Magnetic susceptibility of the elements and inorganic compounds, in Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5. 
  3. Endt, P. M. (1990). "Energy levels of A = 21–44 nuclei (VII)". Nuclear Physics A. 521: 1–400. Bibcode:1990NuPhA.521....1E. doi:10.1016/0375-9474(90)90598-G.