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Pb
Pb symbol for the element lead .
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red lead
red lead bright red to orange-red powder, also called minium, that is used in the manufacture of storage batteries, lead glass, and red pigments; a paint made with red lead is commonly used to protect iron and steel from rusting. Chemically, red lead is lead tetroxide, Pb 3 O 4 , a water-insoluble ...
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embolus
embolus , foreign matter circulating in and obstructing a blood vessel. It may be a portion of a clot that has separated from the wall of a vessel (see thrombosis ), a bubble of gas or air (known as an air embolus), a globule of fat, a clump of bacterial matter, or a clump of tumor cells. It circul...
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Lord William George Frederick Cavendish Bentinck
Lord William George Frederick Cavendish Bentinck 1802-48, English politician and sportsman, known as Lord George. Although he entered Parliament in 1826, he was known primarily for his horse-racing activities until in 1846 he emerged as a leading opponent of the repeal of the corn laws. His brillia...
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Morarji Ranchhodji Desai
Morarji Ranchhodji Desai , 1896-1995, Indian political leader. He joined the government in 1956, becoming minister of finance (1958-63). He returned to government in 1967 as deputy prime minister and minister of finance, but in 1969 was maneuvered from office by Indira Gandhi and became leader of ...
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Conwy Lloyd Morgan
Conwy Lloyd Morgan 1852-1936, English psychologist. Professor of zoology at University College, Bristol (1887-1909), he served as first vice chancellor of the Univ. of Bristol (1909-10) and was professor of psychology and ethics until his retirement in 1919. He was one of the founders of animal psy...
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lead
lead metallic chemical element; symbol Pb [Lat. plumbum ]; at. no. 82; at. wt. 207.2; m.p. 327.502°C; b.p. about 1,740°C; sp. gr. 11.35 at 20°C; valence +2 or +4. One of the oldest metals used by humanity, lead was known to the ancient Egyptians and Babylonians. The Romans used it for ...
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tetraethyl lead
tetraethyl lead , (C 2 H 5 ) 4 Pb, viscous, colorless, poisonous liquid. It is an organometallic compound prepared by reacting ethyl chloride with a sodium-lead alloy. When added to gasoline, it improves the combustion characteristics (see octane number ). When tetraethyl lead burns in an engine, l...
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lead poisoning
lead poisoning or plumbism , intoxication of the system by organic compounds containing lead . These enter the body by respiration (of dust, fumes, or sprays) or by ingestion of food or other substances that contain lead. Lead poisoning, formerly a leading occupational hazard in industrialized ...
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Periodic Table of the Elements: Lead
Periodic Table of the Elements: Lead
Periodic Table of the Elements: Lead
Atomic Number:
82
Atomic Symbol:
Pb
Lead
Atomic Weight:
207.2
Electron
Configuration:
2 ·...
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