Cobalt (Co)
Cobalt is a hard, lustrous metal used to create vivid blue pigments and in rechargeable batteries.
Properties of Cobalt
- Atomic number
- 27
- Category
- Transition Metal
- Atomic mass
- 58.933 u
- Electron configuration
- [Ar] 3d⁷ 4s²
- Melting point
- 1768 K (1494.85 °C)
- Boiling point
- 3200 K (2926.85 °C)
- Density
- 8.9 g/cm³
- Electronegativity (Pauling)
- 1.88
- Appearance
- Hard, lustrous, bluish-gray metal
- Discovered by
- Georg Brandt (1735)
Facts about Cobalt
- Cobalt gives glass and ceramics a stunning deep blue color!
- The word "cobalt" comes from "kobold," a German word for goblin!
- Cobalt is a key ingredient in the rechargeable batteries in electric cars!
- Cobalt blue paint has been used by artists for thousands of years!