Template:Infobox lithium

<tr><td>Chemical series</td><td>alkali metals</td></tr> <tr><td>Appearance</td><td>silvery white/grey
<tr><td>Atomic radius</td><td>145pm</td></tr><tr><td>Atomic radius (calc.)</td><td>167 pm</td></tr><tr><td>Covalent radius</td><td>134 pm</td></tr><tr><td>Van der Waals radius</td><td>182 pm</td></tr> <tr><td rowspan="1" valign="top">Magnetic ordering</td><td>paramagnetic</td></tr><tr><td>Electrical resistivity</td><td>(20 °C) 92.8 nΩ·m</td></tr><tr><td>Thermal conductivity</td><td>(300 K) 84.8 W·m⁻¹·K⁻¹</td></tr><tr><td>Thermal expansion</td><td>(25 °C) 46 µm·m⁻¹·K⁻¹</td></tr><tr><td>Speed of sound (thin rod)</td><td>(20 °C) 6000 m/s</td></tr><tr><td>Young's modulus</td><td>4.9 GPa</td></tr><tr><td>Shear modulus</td><td>4.2 GPa</td></tr><tr><td>Bulk modulus</td><td>11 GPa</td></tr><tr><td>Mohs hardness</td><td>0.6</td></tr><tr><td>CAS registry number</td><td>7439-93-2</td></tr>

3 helium ← lithium → beryllium H ↑ Li ↓ Na Periodic table - Extended periodic table
General
Name, symbol, number	lithium, Li, 3
Group, period, block	1, 2, s
Standard atomic weight	6.941(2) g·mol−1
Electron configuration	1s2 2s1
Electrons per shell	2, 1
Physical properties<tr><td>Phase</td><td>solid</td></tr><tr><td>Density (near r.t.)</td><td>0.534 g·cm−3</td></tr><tr><td>Liquid density at m.p.</td><td>0.512 g·cm−3</td></tr><tr><td>Melting point</td><td>453.69 K (180.54 °C, 356.97 °F)</td></tr><tr><td>Boiling point</td><td>1615 K (1342 °C, 2448 °F)</td></tr><tr><td>Critical point</td><td>(extrapolated) 3223 K, 67 MPa</td></tr><tr><td>Heat of fusion</td><td>3.00 kJ·mol−1</td></tr><tr><td>Heat of vaporization</td><td>147.1 kJ·mol−1</td></tr><tr><td>Heat capacity</td><td>(25 °C) 24.860 J·mol−1·K−1</td></tr>
Vapor pressure P/Pa 1 10 100 1 k 10 k 100 k at T/K 797 885 995 1144 1337 1610
Atomic properties <tr><td>Crystal structure</td><td>cubic body centered</td></tr><tr><td>Oxidation states</td><td>1 (strongly basic oxide)</td></tr><tr><td>Electronegativity</td><td>0.98 (Pauling scale)</td></tr>
Ionization energies	1st: 520.2 kJ/mol
	2nd: 7298.1 kJ/mol
	3rd: 11815.0 kJ/mol
Miscellaneous
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