Template:Infobox magnesium

Magnesium, ₁₂Mg
Magnesium
Pronunciation	/mæɡˈniːziəm/ (mag-NEE-zee-əm)
Appearance	shiny gray solit
Standard atomic weight Ar, std(Mg)	[24.304, 24.307] conventional: 24.305
Magnesium in the periodic cairt
	sodium ← magnesium → alumeenium
Atomic nummer (Z)	12
Group	group 2 (alkaline yird metals)
Period	period 3
Block	s-block
Element category	Alkaline yird metal
Electron confeeguration	[Ne] 3s2
Electrons per shell	2, 8, 2
Pheesical properties
Phase at STP	solit
Meltin pynt	923 K (650 °C, 1202 °F)
Bylin pynt	1363 K (1091 °C, 1994 °F)
Density (near r.t.)	1.738 g/cm3
when liquid (at m.p.)	1.584 g/cm3
Heat o fusion	8.48 kJ/mol
Heat o vapourisation	128 kJ/mol
Molar heat capacity	24.869 J/(mol·K)
Atomic properties
Oxidation states	+1, +2 strangly basic
Electronegativity	Pauling scale: 1.31
Ionisation energies	1st: 737.7 kJ/mol ; 2nd: 1450.7 kJ/mol ; 3rd: 7732.7 kJ/mol ; (more) ;
Atomic radius	empirical: 160 pm
Covalent radius	141±7 pm
Van der Waals radius	173 pm
	Colour lines in a spectral rangeSpectral lines o magnesium
Ither properties
Naitural occurrence	primordial
Creestal structur	hexagonal close-packed (hcp)
Speed o soond thin rod	4940 m/s (at r.t.) (annealed)
Thermal expansion	24.8 µm/(m·K) (at 25 °C)
Thermal conductivity	156 W/(m·K)
Electrical resistivity	43.9 nΩ·m (at 20 °C)
Magnetic orderin	paramagnetic
Magnetic susceptibility	+13.1·10−6 cm3/mol (298 K)
Young's modulus	45 GPa
Shear modulus	17 GPa
Bulk modulus	35.4 GPa
Poisson ratio	0.290
Mohs haurdness	1–2.5
Brinell haurdness	44–260 MPa
CAS Nummer	7439-95-4
History
Namin	after Magnesia, Greece
Diskivery	Joseph Black (1755)
First isolation	Humphry Davy (1808)
Main isotopes o magnesium
	view; talk; edit; \| references

style="text-align:left"\| data m.p. cat v
	in	calc from C	diff	report	ref
C	650	—	—
K	923	923	0
F	1202	1202	0
WD	649 !649 Celsius				^[4]
input	C: 650, K: 923, F: 1202
comment

style="text-align:left"\| data b.p. cat v
	in	calc from C	diff	report	ref
C	1091	—	—
K	1363	1364	-1	delta
F	1994	1996	-2	delta
WD	1100 !1100 Celsius				^[4]
input	C: 1091, K: 1363, F: 1994
comment

PTMagnesium

Na ←	^iso ₁₂Mg E infobox E isobox	→ Al
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References

↑ Bernath, P. F.; Black, J. H. & Brault, J. W. (1985). "The spectrum of magnesium hydride" (PDF). Astrophysical Journal. 298: 375. Bibcode:1985ApJ...298..375B. doi:10.1086/163620.
↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.
↑ K. A. Gschneider, Solid State Phys. 16, 308 (1964)
1 2 "MAGNESIUM (POWDER)"; date retrieved: 13 Juin 2019.

[1] Bernath, P. F.; Black, J. H. & Brault, J. W. (1985). "The spectrum of magnesium hydride" (PDF). Astrophysical Journal. 298: 375. Bibcode:1985ApJ...298..375B. doi:10.1086/163620.

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

[3] K. A. Gschneider, Solid State Phys. 16, 308 (1964)

[wikidata-cfdb89b82800081cf1cef16b0d14f974eaa04db2-v3-4] 1 2 "MAGNESIUM (POWDER)"; date retrieved: 13 Juin 2019.

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