Bismuth (Bi)

Bismuth is a chemical element with symbol Bi and atomic number 83. A pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony.

Atomic Number

83

Atomic Mass

208.98 u

Category

post transition

Phase

solid

Density

9.78 g/cm³

Electron Shells

2, 8, 18, 32, 18, 5

Atomic Structure

Protons: 83 • Electrons: 83 • Neutrons: Varies by isotope

Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p³

Discovery

1753 • Claude François Geoffroy