Template:Infobox sodium

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11 neon ← sodium → magnesium Li ↑ Na ↓ K Periodic Table - Extended Periodic Table
General
Name, Symbol, Number	sodium, Na, 11
Chemical series	alkali metals
Group, Period, Block	1, 3, s
Appearance	silvery white
Standard atomic weight	22.98976928(2) g·mol−1
Electron configuration	[Ne] 3s1
Electrons per shell	2, 8, 1
Physical properties
Phase	solid
Density (near r.t.)	0.968 g·cm−3
Liquid density at m.p.	0.927 g·cm−3
Melting point	370.87 K (97.72 °C, 207.9 °F)
Boiling point	1156 K (883 °C, 1621 °F)
Critical point	(extrapolated) 2573 K, 35 MPa
Heat of fusion	2.60 kJ·mol−1
Heat of vaporization	97.42 kJ·mol−1
Heat capacity	(25 °C) 28.230 J·mol−1·K−1
Vapor pressure P/Pa 1 10 100 1 k 10 k 100 k at T/K 554 617 697 802 946 1153
Atomic properties
Crystal structure	cubic body centered
Oxidation states	1 (strongly basic oxide)
Electronegativity	0.93 (Pauling scale)
Ionization energies (more)	1st: 495.8 kJ·mol−1
	2nd: 4562 kJ·mol−1
	3rd: 6910.3 kJ·mol−1
Atomic radius	180 pm
Atomic radius (calc.)	190 pm
Covalent radius	154 pm
Van der Waals radius	227 pm
Miscellaneous
Magnetic ordering	paramagnetic
Electrical resistivity	(20 °C) 47.7 nΩ·m
Thermal conductivity	(300 K) 142 W·m−1·K−1
Thermal expansion	(25 °C) 71 µm·m−1·K−1
Speed of sound (thin rod)	(20 °C) 3200 m/s
Young's modulus	10 GPa
Shear modulus	3.3 GPa
Bulk modulus	6.3 GPa
Mohs hardness	0.5
Brinell hardness	0.69 MPa
CAS registry number	7440-23-5
Selected isotopes
Main article: Isotopes of sodium iso NA half-life DM DE (MeV) DP 22Na syn 2.602 y β+ 0.546 22Ne ε - 22Ne γ 1.2745 - 23Na 100% Na is stable with 12 neutrons
References
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• This page was last modified 01:21, 27 March 2007 by Wikipedia user MZMcBride.
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