Strontium

Strontium, ₃₈Sr
Strontium
Pípè	/ˈstrɒnʃiəm,_ʔtiəm/ (STRON-shee-əm-,_--tee-əm)
Ìhànsójú	silvery white metallic
Ìwúwo átọ̀mù Ar, std(Sr)	87.62(1)
Strontium ní orí tábìlì àyè
	rubidium ← strontium → yttrium
Nọ́mbà átọ̀mù (Z)	38
Ẹgbẹ́	group 2 (alkaline earth metals)
Àyè	àyè 5
Àdìpọ̀	Àdìpọ̀-s
Ẹ̀ka ẹ́límẹ́ntì	Alkaline earth metal
Ìtò ẹ̀lẹ́ktrọ́nù	[Kr] 5s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 8, 2
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	1050 K (777 °C, 1431 °F)
Ígbà ìhó	1655 K (1382 °C, 2520 °F)
Kíki (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	136.9 kJ/mol
Molar heat capacity	26.4 J/(mol·K)
Atomic properties
Oxidation states	+1, +2 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 0.95
Atomic radius	empirical: 215 pm
Covalent radius	195±10 pm
Van der Waals radius	249 pm
	Color lines in a spectral rangeSpectral lines of strontium
Other properties
Natural occurrence	primordial
Crystal structure	(fcc)
Thermal expansion	22.5 µm/(m·K) (at 25 °C)
Thermal conductivity	35.4 W/(m·K)
Electrical resistivity	132 n Ω·m (at 20 °C)
Magnetic ordering	paramagnetic
Shear modulus	6.1 GPa
Poisson ratio	0.28
Mohs hardness	1.5
CAS Number	7440-24-6
Main isotopes of strontium
	Àdàkọ:Category-inline; wo; ọ̀rọ̀; àtúnṣe; \| references

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Itokasi

↑ Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna 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.
↑ Colarusso, P.; Guo, B.; Zhang, K.-Q.; Bernath, P. F. (1996). "High-Resolution Infrared Emission Spectrum of Strontium Monofluoride". J. Molecular Spectroscopy 175 (1): 158. Bibcode 1996JMoSp.175..158C. doi:10.1006/jmsp.1996.0019. http://bernath.uwaterloo.ca/media/149.pdf.
↑ P. Colarusso et al. (1996). "High-Resolution Infrared Emission Spectrum of Strontium Monofluoride". J. Molecular Spectroscopy 175: 158. http://bernath.uwaterloo.ca/media/149.pdf.