Lead is a chemical element in the carbon group with symbol Pb (from Latin: plumbum) and atomic number 82. Lead is a soft and malleable metal, which is regarded as a heavy metal and poor metal. Metallic lead has a bluish-white color after being freshly cut, but it soon tarnishes to a dull grayish color when exposed to air. Lead has a shiny chrome-silver luster when it is melted into a liquid.Symbol: Pb
Melting point: 327.5 °C
Electron configuration: [Xe] 4f14 5d10 6s2 6p2
Atomic number: 82
Discovered: 7000 BC
Atomic mass: 207.2 ± 0.1 u