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Encyclopedia
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Lead: Encyclopedia - Lead
Lead is a chemical element in the periodic table that has the symbol Pb (L. plumbum) and atomic number 82. A soft, heavy, toxic and mall...
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Encyclopedia
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Lead: Encyclopedia Ii - Lead - Isotopes
Main Article: Isotopes of lead
Lead has four stable, naturally occurring isotopes:
Pb204 (1.4%)
Pb206(24.1%)
Pb207(22.1%)
and Pb208 (52.4...
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Encyclopedia
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Lead: Encyclopedia Ii - Lead - History
Lead has been used by humans for at least 7000 years, because it was (and continues to be) widespread and easy to extract, as well as eas...
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Encyclopedia
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Lead: Encyclopedia Ii - Lead - Language Derivations
The Latin plumbum has given birth to a number of terms in the English language:
Plumbing, or system of piping, derives from the fact tha...
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Encyclopedia
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Lead: Encyclopedia Ii - Lead - Occurrence
Native lead does occur in nature, but it is rare. Currently lead is usually found in ore with zinc, silver and (most abundantly) copper, ...
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Encyclopedia
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Lead: Encyclopedia Ii - Lead - Health Effects
Main article: lead poisoning
The concern about lead's role in mental retardation in children has brought about widespread reduction in it...
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