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.
Experiment with the elements
Bismuth doesn't form any compounds in our lab yet, but the periodic table sandbox lets you combine dozens of other real elements into real compounds — water, table salt, ammonia and many more — with their true chemical formulas.