The lightest metal, soft enough to cut with a knife and reactive enough to be stored under oil — the element that powers almost every rechargeable device you own.
- Atomic number
- 3
- Atomic mass
- 6.94 u
- Phase
- Solid
- Electron configuration
- [He] 2s¹
- Melting point
- 453.65 K · 180.5 °C
- Boiling point
- 1,615 K · 1,341.9 °C
- Density
- 0.534 g/cm³
- Electronegativity
- 0.98
- Period / Group
- 2 / 1
- Discovery year
- 1817