Calcium

Calcium, ₂₀Ca
Calcium
Ìhànsójú	Dull gray, silver
Ìwúwo átọ̀mù Ar, std(Ca)	40.078(4)
Calcium ní orí tábìlì àyè
	potassium ← calcium → scandium
Nọ́mbà átọ̀mù (Z)	20
Ẹgbẹ́	group 2 (alkaline earth metals)
Àyè	àyè 4
Àdìpọ̀	Àdìpọ̀-s
Ẹ̀ka ẹ́límẹ́ntì	Alkaline earth metal
Ìtò ẹ̀lẹ́ktrọ́nù	[Ar] 4s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 8, 2
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	1115 K (842 °C, 1548 °F)
Ígbà ìhó	1757 K (1484 °C, 2703 °F)
Kíki (near r.t.)	1.55 g/cm3
when liquid (at m.p.)	1.378 g/cm3
Heat of fusion	8.54 kJ/mol
Heat of	154.7 kJ/mol
Molar heat capacity	25.929 J/(mol·K)
Atomic properties
Oxidation states	+1, +2 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 1.00
energies	(more);
Atomic radius	empirical: 197 pm
Covalent radius	176±10 pm
Van der Waals radius	231 pm
	Color lines in a spectral rangeSpectral lines of calcium
Other properties
Natural occurrence	primordial
Crystal structure	(fcc)
Speed of sound thin rod	3810 m/s (at 20 °C)
Thermal expansion	22.3 µm/(m·K) (at 25 °C)
Thermal conductivity	201 W/(m·K)
Electrical resistivity	33.6 n Ω·m (at 20 °C)
Magnetic ordering	diamagnetic
Young's modulus	20 GPa
Shear modulus	7.4 GPa
Bulk modulus	17 GPa
Poisson ratio	0.31
Mohs hardness	1.75
Brinell hardness	167 MPa
CAS Number	7440-70-2
Main isotopes of calcium
	Àdàkọ:Category-inline; wo; ọ̀rọ̀; àtúnṣe; \| references

Kalisiomu jẹ́ kémíkàlì ìdá-ìpílè pẹ̀lú àmì ìdámò Ca àti ogún nọ́mbà átọ̀mù. Kalisiomu jẹ́́ alàwọ eléérú rírọ̀̀, ẹgbẹ́́ alkaline earth metal, ikarun ìdá-ìpílè tí ó wúwo jú nílé ayé.^[3]

Ìtókasí

↑ 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.
↑ Krieck, Sven; Görls, Helmar; Westerhausen, Matthias (2010). "Mechanistic Elucidation of the Formation of the Inverse Ca(I) Sandwich Complex [(thf)3Ca(μ-C6H3-1,3,5-Ph3)Ca(thf)3] and Stability of Aryl-Substituted Phenylcalcium Complexes". Journal of the American Chemical Society 132 (35): 12492–12501. doi:10.1021/ja105534w. PMID 20718434.
↑ Dickson, A. G.; Goyet, C. (1994). "Chapter 5". Handbook of method for the analysis of the various parameters of the carbon dioxide system in sea water, version 2. ORNL/CDIAC-74. Archived from the original on 2011-05-25. https://web.archive.org/web/20110525155035/http://cdiac.esd.ornl.gov/ftp/cdiac74/chapter5.pdf. Retrieved 2015-06-19.

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[CIAAW2013-1] 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.

[West-2] Krieck, Sven; Görls, Helmar; Westerhausen, Matthias (2010). "Mechanistic Elucidation of the Formation of the Inverse Ca(I) Sandwich Complex [(thf)3Ca(μ-C6H3-1,3,5-Ph3)Ca(thf)3] and Stability of Aryl-Substituted Phenylcalcium Complexes". Journal of the American Chemical Society 132 (35): 12492–12501. doi:10.1021/ja105534w. PMID 20718434.

[3] Dickson, A. G.; Goyet, C. (1994). "Chapter 5". Handbook of method for the analysis of the various parameters of the carbon dioxide system in sea water, version 2. ORNL/CDIAC-74. Archived from the original on 2011-05-25. https://web.archive.org/web/20110525155035/http://cdiac.esd.ornl.gov/ftp/cdiac74/chapter5.pdf. Retrieved 2015-06-19.

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