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Sodium,  11Na
Na (Sodium).jpg
General properties
Appearance sillery 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
Group group 1 (alkali metals)
Period period 3
Element category   alkali metal
Block s-block
Electron confeeguration [Ne] 3s1
Electrons per shell
2,8,1
Pheesical properties
Phase (at STP) solit
Meltin pynt 370.944 K ​(97.794 °C, ​208.029 °F)
Bylin pynt 1156.090 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 fusion 2.60 kJ/mol
Heat o vapourisation 97.42 kJ/mol
Molar heat capacity 28.230 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 states 1, −1 ​strangly basic oxide
Electronegativity Pauling scale: 0.93
Ionisation energies
Atomic radius empirical: 186 pm
Covalent radius 166±9 pm
Van der Waals radius 227 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 rod 3200 m/s (at 20 °C)
Thermal expansion 71 µm/(m·K) (at 25 °C)
Thermal conductivity 142 W/(m·K)
Electrical resistivity 47.7 n Ω·m (at 20 °C)
Magnetic orderin paramagnetic[2]
Young's modulus 10 GPa
Shear modulus 3.3 GPa
Bouk modulus 6.3 GPa
Mohs haurdness 0.5
Brinell haurdness 0.69 MPa
CAS Nummer 7440-23-5
History
Diskivery Humphry Davy (1807)
First isolation Humphry 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.