It's the chemical symbol for bismuth
271 C. [DOC] [TLE] Bismuththe essentials [WebElements Periodic Table] [PAR] Bismuth is found in the ores bismuthinite (Bi2S3), bismite (-Bi2O3), and 
bismutite ... Density of the chemical elements on a miniature periodic table spark 
table ... Bismuth atoms have 83 electrons and the shell structure is 2.8.18.32.18.5
.