(From the Old English lead) A heavy, soft, malleable, bluish-gray metallic chemical element used in batteries and in numerous alloys and compounds.

Symbol: Pb
Atomic number: 82
Atomic weight: 207.2
Density (at room temperature and pressure): 11.34 g/cc
Melting point: 327.5°C
Boiling point: 1,740°C
Main valence: +2, +4
Ground state electron configuration: [Xe]4f145d106s26p2