Lead is a chemical element in the periodic table that has the symbol Pb (Latin: plumbum) and atomic number 82. A soft, heavy, toxic and malleable poor metal, lead is bluish white when freshly cut but tarnishes to dull gray when exposed to air. Lead is used in building construction, lead-acid batteries, bullets and shot, and is part of solder, pewter, and fusible alloys. Lead has the highest atomic number of all stable elements - although the next element, bismuth, has a half life so long (longer than the estimated age of the universe) it can be considered stable. Like mercury, another heavy metal, lead is a potent neurotoxin which accumulates in soft tissues and bone over time.

The term "lead" was found in the following pages:

27th Montreux Symposium on LC/MS | EVISA's Agenda of Events
Instrument database: Thermo Scientific - XVI+ Total Sulfur analyzer
Material database: National Institute of Standards and Technology (NIST) - SRM 955c - Toxic Elements in Caprine Blood /Level 2
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Material database: IAEA - MEL International Atomic Energy Agency - IAEA-452 , Biota, Scallop (Pecten maximus)
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Material database: IRMM - Institute for Reference Materials and Measurements - BCR-320R - Channel Sediment
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Directory of scientists: Carlo Barbante
Link database: eMedicine: Toxicity, Heavy Metals
Material database: National Institute of Standards and Technology (NIST) - SRM 726 - Selenium, Intermediate Purity
Company database: Grace Vydac Inc.
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Link database: Encyclopedia of Earth: Mercury in the Great Lakes
Link database: US Consumer Product Safety Commision: Information, Regulations and Guidance about Lead in Consumer Products
Material database: National Institute of Standards and Technology (NIST) - SRM 1566 b - Oyster Tissue
Company database: Federation of American Societies for Experimental Biology (FASEB)
Link database: Eh-pH diagram for SILVER (Ag): Geochemistry
Company database: American Physical Society (APS)