Atomic number: 83

Symbol: Bi

Category: post-transition metal (poor conductor of electricity)

Density at 25°C: solid: density: 11.34 g·cm−3

Known, in some sense, since ancient times it was confused with similar elements like lead and tin. The name 'bismuth' is thought to come from meaning 'similar to antimony'.  Being much less toxic than lead, it is used as a replacement and is often used in compounds for cosmetics.

Bismuth crystal. image: adapted from wikipedia

Use, natural applications or common combinations: 

  • cosmetics, pigments, alloys, iridescent quality
  • medicinal compounds
  • lead replacement

Basic characteristics:

  • Standard atomic weight: 208.980 40(1)
  • Melting point: 271.5 °C
  • Boiling point: 1749 °C
  • Radioactivity: all naturally stable. Some isotopes have very long half lives much longer than the age of the current universe.