7 links
ChemicalElements.com: Lead
chemicalelements.com
Basic information, atomic structure, and isotopes table.
EnvironmentalChemistry.com: Lead
environmentalchemistry.com
Atomic structure, chemical and physical properties, and table of nuclides.
WebElements: Lead
ebelements.com
Extensive information on history, uses, occurrence, compounds, and properties.
Wikipedia: Lead
en.wikipedia.org
Properties of the element, including its history, applications, and characteristics.