Chemical Properties Physical Properties Mechanical Properties Thermal Properties Applications. Introduction. Lead is a chemical element with Pb as its symbol. It belongs to group 14 of the periodic table and its atomic number is 82. Lead has been in use for centuries. It is usually found in the ores of silver, zinc, and copper.
Physical properties Atomic. A lead atom has 82 electrons, arranged in an electron configuration of []4f 14 5d 10 6s 2 6p 2.The sum of lead's first and second ionization energies—the total energy required to remove the two 6p electrons—is close to that of tin, lead's upper neighbor in the carbon group.This is unusual; ionization energies generally fall going down a group, as an element's ...
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Lead is the heaviest stable element, a distinction that used to belong to bismuth — element number 83 — until it was found to be very slightly radioactive. One of the most important physical properties of lead is its ability to absorb high frequency electromagnetic radiation, such as x-rays and gamma rays.
Uses and properties. Image explanation. Lead has been known to, and used by, humans for many centuries. This long history is reflected in the image by the use of an early alchemical symbol for lead and carved Ancient Roman characters. Appearance. A dull, silvery-grey metal. It …
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Lead is a naturally occurring element and is a member of Group 14 (IVA) of the periodic table. Natural lead is a mixture of four stable isotopes, 208Pb (51–53%), 206Pb (23.5– −27%), 207Pb (20.5–23%), and 204Pb (1.35–1.5%). Lead isotopes are the stable decay product of three naturally radioactive elements: 206Pb from uranium, 207Pb from actinium, and 208Pb from thorium.
Lead pipes bearing the insignia of Roman emperors, used as drains from the baths, are still in service. Alloys include pewter and solder. Tetraethyl lead (PbEt 4) is still used in some grades of petrol (gasoline) but is being phased out on environmental grounds. Lead is a major constituent of the lead-acid battery used extensively in car batteries.
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Properties of lead. Published by International Lead Association 27th October, 2020. Lead is a soft, malleable, ductile, bluish-white, dense metallic element, extracted chiefly from galena and found in ore with zinc, silver and copper. Whilst it is still used for its malleability and corrosion resistance, it is its chemical properties that make ...
Properties of Lead. Lead (Pb) is a white lustrous metal with a soft texture and is highly malleable. The metal is highly corrosion resistant, in addition to not being a poor conductor of electricity. The metal in its powdered form produces a bluish-white flame when burnt in air. Once mixed with fluorine in room temperature forms lead fluoride.
lead - lead - Properties of the element: Lead and its compounds are toxic and are retained by the body, accumulating over a long period of time—a phenomenon known as cumulative poisoning—until a lethal quantity is reached. The toxicity of lead compounds increases as their solubility increases. In children the accumulation of lead may result in cognitive deficits; in adults it may produce ...
Properties that are responsible for the many uses of elemental lead include its ductility, ease of welding, low melting point, high density, and ability to absorb gamma radiation and X-radiation. Molten lead is an excellent solvent and collector for elemental silver and gold. The structural applications of lead are limited by its low tensile ...
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