Bismuth

Atomic symbol: Bi
Atomic number: 83
Atomic mass: 208.98

Appearance: Silver solid with a brown tint at 25°C

Group: 15
Period: 6
Series: Post-transition metals
Block: p
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d¹⁰ 6s² 6p³

Crystalline and brittle.

Unusually, like water, bismuth expands when it freezes.

Fun Fact! Bismuth is the most diamagnetic metal; it both resists being magnetized and is repelled by a magnetic field.