👉 Bismuth is a chemical element with the symbol Bi and atomic number 48. It is a rare metal that has several important biological, medical, and industrial properties. The name "bismuth" comes from the Greek word "bi" meaning two or three, and "mith" which means stone. The term bismuth was first used in the 19th century to describe a chemical compound with a specific chemical formula: Bi3N2 (or Bi2(N