Voozh

[[File:face-centred cubic|frameless|alt=Face-centred cubic creestal structur for calcium|upright=0.23|Face-centred cubic creestal structur for calcium]]

Speed o soond thinrod

3810m/s(at20°C)

Thermal expansion

22.3µm/(m·K)(at25°C)

Thermal conductivity

201W/(m·K)

Electrical resistivity

33.6nΩ·m(at20°C)

Magnetic orderin

diamagnetic

Magnetic susceptibility

+40.0·10⁻⁶cm³/mol^[4]

20GPa

7.4GPa

17GPa

0.31

1.75

170–416MPa

7440-70-2

History

Diskivery an first isolation

Humphry Davy(1808)

Main isotopes o calcium

Isotope	Abundance	Hauf-life (t_1/2)	Decay mode	Product
⁴⁰Ca	96.941%	stable
⁴¹Ca	trace	9.94×10⁴y	ε	⁴¹K
⁴²Ca	0.647%	stable
⁴³Ca	0.135%	stable
⁴⁴Ca	2.086%	stable
⁴⁵Ca	syn	162.6d	β⁻	⁴⁵Sc
⁴⁶Ca	0.004%	stable
⁴⁷Ca	syn	4.5d	β⁻	⁴⁷Sc
⁴⁷Ca	syn	4.5d	γ	–
⁴⁸Ca	0.187%	6.4×10¹⁹y	β⁻β⁻	⁴⁸Ti

|references

Calcium is the chemical element wi seembolCa an atomic nummer20. Calcium is a saft gray alkaline yird metal, an is the fift-maist-abundant element bi mass in the Yird's crust. Calcium is the fift-maist-abundant dissolved ion in seawatter bi baith molarity an mass, efter sodium, chloride, magnesium, an sulphate.^[5]

Calcium is essential for livin organisms, in parteecular in cell pheesiology, whaur muivement o the calcium ion Ca²⁺ intae an oot o the cytoplasm functions as a signal for mony cellular processes. As a major material uised in mineralisation o bane, teeth an shells, calcium is the maist abundant metal bi mass in mony ainimals.

References

[eedit | edit soorce]

↑ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth–Heinemann. p.112. ISBN 0080379419.
↑ 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.
↑ 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.
↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp.E110. ISBN 0-8493-0464-4.
↑ Dickson, A. G. and Goyet, C. (1994). "5". Handbook of method for the analysis of the various parameters of the carbon dioxide system in sea water, version 2 (PDF). ORNL/CDIAC-74. Archived frae the original (PDF) on 25 Mey 2011. Retrieved 29 Juin 2013.CS1 maint: multiple names: authors leet (link)