Template:Infobox strontium

Strontium, 38Sr
Template:Infobox element/symbol-to-top-image/alt
Strontium
Pronunciation/ˈstrɒnʃiəm, -tiəm/ (STRON-shee-əm, -tee-əm)
Appearancesillery white metallic; wi a fauch yellae tint[1]
Standard atomic weight Ar, std(Sr)87.62(1)[2]
Strontium 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
Ca

Sr

Ba
rubidiumstrontiumyttrium
Atomic nummer (Z)38
Groupgroup 2 (alkaline yird metals)
Periodperiod 5
Blocks-block
Element category  Alkaline yird metal
Electron confeeguration[Kr] 5s2
Electrons per shell2, 8, 18, 8, 2
Pheesical properties
Phase at STPsolit
Meltin pynt1050 K ​(777 °C, ​1431 °F)
Bylin pynt1650 K ​(1377 °C, ​2511 °F)
Density (near r.t.)2.64 g/cm3
when liquid (at m.p.)2.375 g/cm3
Heat o fusion7.43 kJ/mol
Heat o vapourisation141 kJ/mol
Molar heat capacity26.4 J/(mol·K)
Vapour pressur
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 796 882 990 1139 1345 1646
Atomic properties
Oxidation states+1,[3] +2 strangly basic
ElectronegativityPauling scale: 0.95
Ionisation energies
  • 1st: 549.5 kJ/mol
  • 2nd: 1064.2 kJ/mol
  • 3rd: 4138 kJ/mol
Atomic radiusempirical: 215 pm
Covalent radius195±10 pm
Van der Waals radius249 pm
Colour lines in a spectral range
Colour lines in a spectral range
Spectral lines o strontium
Ither properties
Naitural occurrenceprimordial
Creestal structur ​face-centred cubic
Thermal expansion22.5 µm/(m·K) (at 25 °C)
Thermal conductivity35.4 W/(m·K)
Electrical resistivity132 nΩ·m (at 20 °C)
Magnetic orderinparamagnetic
Young's modulus15.7 GPa
Shear modulus6.03 GPa
Poisson ratio0.28
Mohs haurdness1.5
CAS Nummer7440-24-6
History
Naminefter the mineral strontianite, itsel named efter Strontian, Scotland
DiskiveryWilliam Cruickshank (1787)
First isolationHumphry Davy (1808)
Main isotopes o strontium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct
82Sr syn 25.36 d ε 82Rb 83Sr syn 1.35 d ε 83Rb
β+ 83Rb
γ
84Sr 0.56% (β+β+) 84Kr
85Sr syn 64.84 d ε 85Rb
γ
86Sr 9.86% stable
87Sr 7.0% stable
88Sr 82.58% stable
89Sr syn 50.52 d ε 89Rb
β 89Y
90Sr trace 28.90 y β 90Y
Decay modes in parentheses are predictit, but hisnae yet been observed
| references
style="text-align:left"|
in calc from C diff report ref
C 777
K 1050 1050 0
F 1431 1431 0
WD Edit this at Wikidata
input C: 777, K: 1050, F: 1431
comment
style="text-align:left"|
in calc from C diff report ref
C 1377
K 1650 1650 0
F 2511 2511 0
WD Edit this at Wikidata
input C: 1377, K: 1650, F: 2511
comment

References

  1. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth–Heinemann. p. 112. ISBN 0080379419.
  2. Meija, Juris; 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.
  3. Colarusso, P.; Guo, B.; Zhang, K.-Q.; Bernath, P. F. (1996). "High-Resolution Infrared Emission Spectrum of Strontium Monofluoride" (PDF). J. Molecular Spectroscopy. 175 (1): 158. Bibcode:1996JMoSp.175..158C. doi:10.1006/jmsp.1996.0019.
  4. Standard Atomic Weights 2013. Commission on Isotopic Abundances and Atomic Weights
  5. Colarusso, P.; Guo, B.; Zhang, K.-Q.; Bernath, P.F. (1996). "High-Resolution Infrared Emission Spectrum of Strontium Monofluoride" (PDF). J. Molecular Spectroscopy. 175: 158. Bibcode:1996JMoSp.175..158C. doi:10.1006/jmsp.1996.0019.