Template:Infobox lithium

Lithium,  ₃Li

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General properties
Pronunciation	Template:Infobox element/pronunciation
Appearance	silvery-white
Standard atomic weight (Ar, standard)	Template:Infobox element/standard atomic weight
Mass number	Template:Infobox element/symbol-to-most-stable-isotope (most stable isotope)
Lithium in the periodic table
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Atomic number (Z)	3
Group	Template:Infobox element/group
Period	period 2
Block	s-block
Element category	Template:Infobox element/category format
Electron configuration	[He] 2s1
Electrons per shell	2, 1
Physical properties
Phase at STP	solid
Melting point	453.65 K ​(180.50 °C, ​356.90 °F)
Boiling point	1603 K ​(1330 °C, ​2426 °F)
Density (near r.t.)	0.534 g/cm3
when liquid (at m.p.)	0.512 g/cm3
Critical point	3220 K, 67 MPa (extrapolated)
Heat of fusion	3.00 kJ/mol
[[Enthalpy of vaporization|Heat of Template:Engvar]]	136 kJ/mol
Molar heat capacity	24.860 J/(mol·K)
[[Vapor pressure|Template:Engvar pressure]] Template:Infobox element/vapor pressure table
Atomic properties
Oxidation states	Template:Infobox element/symbol-to-oxidation-state
Electronegativity	Pauling scale: 0.98
[[Ionization energy|Template:Engvar energies]]	1st: 520.2 kJ/mol 2nd: 7298.1 kJ/mol 3rd: 11815.0 kJ/mol
Atomic radius	empirical: 152 pm
Covalent radius	128±7 pm
Van der Waals radius	182 pm
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Other properties
Crystal structure	​Template:Infobox element/crystal structure Template:Infobox element/crystal structure
Speed of sound thin rod	6000 m/s (at 20 °C)
Thermal expansion	46 µm/(m·K) (at 25 °C)
Thermal conductivity	84.8 W/(m·K)
Electrical resistivity	92.8 nΩ·m (at 20 °C)
Magnetic ordering	paramagnetic
Magnetic susceptibility	+14.2·10−6 cm3/mol (298 K)
Young's modulus	4.9 GPa
Shear modulus	4.2 GPa
Bulk modulus	11 GPa
Mohs hardness	0.6
Brinell hardness	5 MPa
CAS Number	7439-93-2
History
Discovery	Johan August Arfwedson (1817)
First isolation	William Thomas Brande (1821)
Main isotopes of lithium
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6Li content may be as low as 3.75% in natural samples. 7Li would therefore have a content of up to 96.25%.