Lithium (Li) — Element 3: Properties & Data | Aladdin Scientific
Lithium(Li) — Element 3
Lithium (Li) is a alkali metal with atomic number 3 and atomic mass 7. It has melting point 453.65 K (180 °C), boiling point 1615 K (1342 °C), density 0.534 g/cm³. It sits in group 1 and period 2 of the periodic table and was discovered in 1817.
Key facts
| Atomic mass | 7.0000 u |
|---|---|
| Electron configuration | [He]2s1 |
| Oxidation states | +1 |
| Electronegativity (Pauling) | 0.98 |
| Atomic radius (van der Waals) | 182 pm |
| Ionization energy | 5.392 eV |
| Electron affinity | 0.618 eV |
| Melting point | 453.65 K |
| Boiling point | 1615 K |
| Density | 0.534 g/cm³ |
| Standard state | Solid |
| Year discovered | 1817 |
Frequently asked questions
What is the electron configuration of lithium?
The ground-state electron configuration of lithium is [He]2s1.
What group and period is lithium in?
Lithium (Li) is in group 1 and period 2 of the periodic table, classified as a alkali metal.
What is the melting point of lithium?
Lithium melts at 453.65 K (180 °C).
What is the standard state of lithium?
Lithium is a solid at standard temperature and pressure.
Related elements
About this data: property values compiled from IUPAC Standard Atomic Weights (2021), the NIST Atomic Spectra Database, and PubChem. Curated by the Aladdin Scientific technical team. Last reviewed: .