SymbolLi
Latin nameLithium
Atomic number3
Period2
Element categoryAlkali metals
Relative atomic mass6.941
GroupI.A
Electronegativity
1.0
Oxidation numbers
1
Electron configuration
1s2 2s1
Density [g/cm3]
0.534
State
Solid
Melting point [°C]
180.54
Boiling point [°C]
1347
Critical point [°C]
2950
Critical pressure [MPa]
67
Atomic radius [pm]
167
Covalent radius [pm]
134
Thermal conductivity [W m-1K-1]
84.7
Heat capacity [J K-1g-1]
3.582
Discovery
1870
Hardness [Mohs scale]
0.6
Young's modulus [GPa]
4.9
Electrical conductivity [S m-1]
1.17 · 107
Shear modulus [GPa]
4.2
Stable isotopes
2
Unstable isotopes
2