The classic poison of history — tasteless, undetectable for centuries, and still a groundwater crisis for millions.
- Atomic number
- 33
- Atomic mass
- 74.922 u
- Phase
- Solid
- Electron configuration
- [Ar] 3d¹⁰ 4s² 4p³
- Melting point
- 1,090 K · 816.9 °C
- Boiling point
- 889 K · 615.9 °C
- Density
- 5.727 g/cm³
- Electronegativity
- 2.18
- Period / Group
- 4 / 15
- Discovery year
- Ancient