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Lead (/ lɛd / ⓘ) is a chemical element; it has symbol Pb (from Latin plumbum) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cut, lead is a shiny gray with a hint of blue. It tarnishes to a dull gray color when exposed to air. Lead has the highest atomic number of any ...
Learn the meaning and usage of the word lead as a verb, noun, adjective, and metal. Find out the difference between lead and led, and explore related phrases and entries.
Learn about the dangers of lead exposure, especially for children, and how to protect yourself and your family from this metal. Find out the sources of lead, the signs of lead poisoning and the treatment options.
Lead is a toxic element that can cause health problems for children, pregnant women and adults. Find out where lead is found, how to lower your exposure, and what to do if you think you have been exposed.
Lead, a soft, silvery white or grayish metal in Group 14 (IVa) of the periodic table. Lead is very malleable, ductile, and dense and is a poor conductor of electricity. Known in antiquity and believed by the alchemists to be the oldest of metals, lead is highly durable and resistant to corrosion.
Learn the meaning of lead as a verb, noun, and adjective in English. Find out how to use lead in different contexts, such as control, influence, direction, and information.
Learn about lead, a heavy metal with various applications and properties, but also a high level of toxicity. Find out how lead is used in batteries, radiation shielding, soldering, and more, and what are the health and environmental effects of lead exposure.
Learn about lead, a soft, malleable, and corrosion-resistant metal with a high atomic number and mass. Find out its history, identification, classification, atomic data, uses, and toxic effects on human health and environment.
Learn about lead, a heavy metal with historical and contemporary importance, and its chemical, physical, and toxicological properties. Explore its atomic structure, compounds, applications, and environmental impact with examples and diagrams.
Learn about the forms, properties, and uses of lead, a soft, blue-gray metal that can be toxic to humans. Find out how lead accumulates in the environment and the body, and how it affects health.