A stiff, feather-light metal that is transparent to X-rays and lethally toxic as dust.
- Atomic number
- 4
- Atomic mass
- 9.012 u
- Phase
- Solid
- Electron configuration
- [He] 2s²
- Melting point
- 1,560 K · 1,286.9 °C
- Boiling point
- 2,743 K · 2,469.9 °C
- Density
- 1.85 g/cm³
- Electronegativity
- 1.57
- Period / Group
- 2 / 2
- Discovery year
- 1798