Lead
Chemical element
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Lead is a chemical element; it has symbol Pb and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cut, lead is a shiny gray with... Wikipedia
Symbol: Pb
Melting point: 621.5°F (327.5°C)
Atomic mass: 207.2 u
Atomic number: 82
Electron configuration: [Xe] 6s² 4f¹⁴ 5d¹⁰ 6p²
Discovery: Middle East (7000 BCE)
Oxidation states: −4, −2, −1, 0, +1, +2, +3, +4 (an amphoteric oxide)