3Solid
Li 6.941 Atomic mass · uAlkali metals
Lithium
Lithium (from Greek:λίθος lithos, "stone") is a chemical element with the symbol Li and atomic number 3. It is a soft, silver-white metal belonging to the alkali metal group of chemical elements. Under standard conditions it is the lightest metal and the least dense solid element.
Discovery 1817 (Johan August Arfwedson)
K2L1
Physical properties
Values for the element in its standard state.
- Density
- 0.535g/cm³
- Melting point
- 454K
- Boiling point
- 1,615K
- Atomic radius
- 134pm
- Bonding type
- Metallic
- Molar heat
- 24.86J/(mol·K)
Inside the atom
Electron arrangement and the energy behind its behavior.
Full electron configuration
1s, 2 electrons; 2s, 1 electrons;
[He] represents 2 core electrons. The full view shows them explicitly.
3 electrons Orbital order preserved from source
- Electronegativity
- 0.98Pauling scale
- First ionization energy
- 520kJ/mol
- Electron affinity
- 60kJ/mol
- Van der Waals radius
- 182pm
Li LithiumAtomic number 3
520kJ/mol
Atomic numberGaps indicate unavailable data
About lithium
- Appearance
- Silvery-white
- Discovery
- 1817 (Johan August Arfwedson)
- Data source
- Read the reference
A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.