Stable isotope Lithium (Li)

Isotope Z(p) N(n) Atomic Mass Natural Abundance Enrichment Level Chemical Form
Li-7 3 4 7.016004 92.50%  ≥99.95%  Hydroxide Monohydrate (7LiOH-H2O)

Properties of Lithium

Name Lithium
Symbol Li
Atomic number 3
Atomic weight 6.941
Standard state Solid at 298 °K
CAS Registry ID 7439-93-2
Group in periodic table 1
Group name Alkali metal
Period in periodic table 2
Block in periodic table s-block
Color Silvery-white
Classification Metallic
Melting point 180.54 °C
Boiling point 1342 °C
Thermal conductivity 84.8 W/(m·K) at 298.2 °K
Electrical resistivity 8.55 µΩ·cm at 0 °C; 12.7 µΩ·cm at 100 ºC
Electronegativity 1.0
Specific heat 3.57 kJ/kg K
Heat of vaporization 147 kJ·mol-1 at 1342 °C
Heat of fusion 3.10 kJ·mol-1
Density of solid 0.534 g/cm3
Vapor pressure 1 torr at 745 °C and 10 torr at 890 ºC
Oxidation state +1
Atomic radius 1.225 Å
Ionic radius Li+: 0.59 Å (coordination number 4)
Electron configuration [He]2s1