Shapino, Hymin Research and Development Department, Ethyl Corporation, Baton Rouge, Louisiana.
Johnston, James D. Ethyl Corporation, Baton Rouge, Louisiana.
Last reviewed:May 2019
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A chemical element, Pb, atomic number 82 and atomic weight 207.2. Lead is a soft bluish metal, which tarnishes to dull gray. It is ductile, malleable, easily fusible, and melts at 327.4°C (621.3°F). The normal chemical valences are 2 and 4. Lead is also a toxic heavy metal. Lead is relatively resistant to attack by sulfuric and hydrochloric acids but dissolves slowly in nitric acid. Lead forms many salts, oxides, and organometallic compounds. See also: Periodic table
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