کينډۍ:Infobox strontium

Strontium, ₃₈Sr
عمومي خواص
Pronunciation	/ˈstrɒnʃəm,_ʔʃiəm,_ʔtiəm/ ; STRON-sh(ee)-əm or STRON-tee-əm
Appearance	silvery white metallic; with a pale yellow tint
Strontium په دوراني جدول کې
rubidium ← strontium → yttrium	‍
اټومي شمیره (Z)	38
گروپ, پیریود	group 2 (alkaline earth metals), period 5
بلاک	s-block
Element category	alkaline earth metal
معياري اټومي وزن (Ar)	کينډۍ:Val
Electron configuration	[Kr] 5s2
Electrons per shell	2, 8, 18, 8, 2
فزیکي خواص
حالت (at STP)	جامد
دويلې کيدو ټکى	1050 K (777 °C, 1431 °F)
يشنا ټکی	1650 K (1377 °C, 2511 °F)
Density near r.t.	2.64 g/cm3
when liquid, at m.p.	2.375 g/cm3
Heat of fusion	7.43 kJ/mol
Heat of vaporization	141 kJ/mol
Molar heat capacity	26.4 J/(mol·K)
اټومي خواص
Oxidation states	2, 1 (a strongly basic oxide)
Electronegativity	Pauling scale: 0.95
Ionization energies	1st: 549.5 kJ/mol ; 2nd: 1064.2 kJ/mol ; 3rd: 4138 kJ/mol ; ;
Atomic radius	empirical: 215 pm
Covalent radius	195±10 pm
Van der Waals radius	249 pm
Miscellanea
Crystal structure	face-centered cubic (fcc) Face-centered cubic crystal structure for strontium
Thermal expansion	22.5 µm/(m·K) (at 25 °C)
د تودوخې تېرېدنه	35.4 W/(m·K)
Electrical resistivity	132 nΩ·m (at 20 °C)
Magnetic ordering	paramagnetic
Magnetic susceptibility (χmol)	−92.0·10−6 cm3/mol (298 K)
Young's modulus	15.7 GPa
Shear modulus	6.03 GPa
Poisson ratio	0.28
Mohs hardness	1.5
CAS Number	7440-24-6
History
Naming	after the mineral strontianite, itself named after Strontian, Scotland
Discovery	William Cruickshank (1787)
First isolation	Humphry Davy (1808)
Main isotopes of strontium
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Element navigation

PTstrontiumPT

Rb ←

iso
38Sr

ibox E

wd:Q938

→ Y

سرچينې

د سرچينو همدا لړليک په ليکنه کې نه ښکاري.

↑ Greenwood and Earnshaw, p. 112
↑ Meija, J.; Coplen, T. B. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure Appl. Chem. 88 (3): 265–91. doi:10.1515/pac-2015-0305. {{cite journal}}: Unknown parameter |displayauthors= ignored (|display-authors= suggested) (help)
↑ 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.
↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.

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[1] Greenwood and Earnshaw, p. 112

[CIAAW2016-2] Meija, J.; Coplen, T. B. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure Appl. Chem. 88 (3): 265–91. doi:10.1515/pac-2015-0305. {{cite journal}}: Unknown parameter |displayauthors= ignored (|display-authors= suggested) (help)

[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: 158. Bibcode:1996JMoSp.175..158C. doi:10.1006/jmsp.1996.0019.

[4] Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.

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