83 Bi 208.98
Bismuth
Post-Transition Metal
Bismuth (Bi) is a chemical element with atomic number 83, classified as a post-transition metal. At room temperature it is a solid. It was discovered in 1753 by Claude François Geoffroy.
Properties
- Atomic number
- 83
- Atomic mass
- 208.98 u
- Category
- Post-Transition Metal
- Group
- 15
- Period
- 6
- Block
- p-block
- Electron configuration
- [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p³
- Phase at STP
- Solid
- Density
- 9.807 g/cm³
- Melting point
- 544.7 K (271.6 °C)
- Boiling point
- 1837 K (1563.8 °C)
- Electronegativity
- 2.02
- Atomic radius
- 143 pm
- Ionization energy
- 7.286 eV
- Discovery
- 1753 · Claude François Geoffroy
Common uses
Cosmetics, medicines, alloys, fire detectors
Did you know?
Creates beautiful rainbow crystals and used in stomach medicines.