How does bismuth react when heated in air?

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A labeled periodic table element box for bismuth shows atomic number 83, symbol Bi, atomic weight 208.9804, electron configuration, and properties including solid state, rhombohedral crystal structure, and weakly acidic oxides. — bismuth Properties of bismuth.

Bismuth does not tarnish when exposed to air at ordinary temperatures. However, when heated in air, it forms an oxide coating. At its boiling point of 1,560 °C (2,840 °F), the metal is oxidized rapidly, producing a yellow-colored oxide that distinguishes it from those formed by other metals.1