Bismuth ore
Bismuth is a chemical element with the chemical symbol Bi, atomic number 83, and atomic weight 208.98040 u. Bismuth is a poor metal with chemical properties similar to arsenic and antimony, both belonging to the nitrogen group. Bismuth can be found in nature, and its sulfides and oxides are important commercial ores. The density of pure bismuth is 86% of that of pure lead. When it is first produced, it is a silver white brittle metal, but its surface turns pink after oxidation. Bismuth is a natural diamagnetic metal and one of the elements with the lowest thermal conductivity among metals.
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