Template:Infobox lithium

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3 helium ← lithium → beryllium H ↑ Li ↓ Na Periodic table - Extended periodic table
General
Name, symbol, number	lithium, Li, 3
Chemical series	alkali metals
Group, period, block	1, 2, s
Appearance	silvery white/grey
Standard atomic weight	6.941(2) g·mol−1
Electron configuration	1s2 2s1
Electrons per shell	2, 1
Physical properties
Phase	solid
Density (near r.t.)	0.534 g·cm−3
Liquid density at m.p.	0.512 g·cm−3
Melting point	453.69 K (180.54 °C, 356.97 °F)
Boiling point	1615 K (1342 °C, 2448 °F)
Critical point	(extrapolated) 3223 K, 67 MPa
Heat of fusion	3.00 kJ·mol−1
Heat of vaporization	147.1 kJ·mol−1
Heat capacity	(25 °C) 24.860 J·mol−1·K−1
Vapor pressure P/Pa 1 10 100 1 k 10 k 100 k at T/K 797 885 995 1144 1337 1610
Atomic properties
Crystal structure	cubic body centered
Oxidation states	1 (strongly basic oxide)
Electronegativity	0.98 (Pauling scale)
Ionization energies	1st: 520.2 kJ/mol
	2nd: 7298.1 kJ/mol
	3rd: 11815.0 kJ/mol
Atomic radius	145 pm
Atomic radius (calc.)	167 pm
Covalent radius	134 pm
Van der Waals radius	182 pm
Miscellaneous
Magnetic ordering	paramagnetic
Electrical resistivity	(20 °C) 92.8 nΩ·m
Thermal conductivity	(300 K) 84.8 W·m−1·K−1
Thermal expansion	(25 °C) 46 µm·m−1·K−1
Speed of sound (thin rod)	(20 °C) 6000 m/s
Young's modulus	4.9 GPa
Shear modulus	4.2 GPa
Bulk modulus	11 GPa
Mohs hardness	0.6
CAS registry number	7439-93-2
Selected isotopes
Main article: Isotopes of lithium iso NA half-life DM DE (MeV) DP 6Li 7.5% Li is stable with 3 neutrons 7Li 92.5% Li is stable with 4 neutrons 6Li content may be as low as 3.75% in natural samples. 7Li would therefore have a content of up to 96.25%.
References
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