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Lead (/ l ɛ d /) 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 ...
Lead (82 Pb) has four observationally stable isotopes: 204 Pb, 206 Pb, 207 Pb, 208 Pb. Lead-204 is entirely a primordial nuclide and is not a radiogenic nuclide.The three isotopes lead-206, lead-207, and lead-208 represent the ends of three decay chains: the uranium series (or radium series), the actinium series, and the thorium series, respectively; a fourth decay chain, the neptunium series ...
Lead (Pb) 82 lead: Anglo-Saxon · Symbol Pb is from the Latin name plumbum, still visible in the English plumbing. [3] [56] Bismuth (Bi) 83 bisemutum: Neo-Latin from German "white mass" descriptive (colour) bisemutum is derived from German Wismuth, perhaps from weiße Masse, and means "white mass", due to its appearance. Polonium (Po) 84 ...
For some elements, this is because the material was known in ancient times, while for others, the name is a more recent invention. For example, Pb is the symbol for lead (plumbum in Latin); Hg is the symbol for mercury (hydrargyrum in Greek); and He is the symbol for helium (a Neo-Latin name) because helium was not known in ancient Roman times.
The chemical symbol for lead (Pb) is derived from the Latin word plumbum, which means 'waterworks' or 'plumbing' as lead was used to make water pipes. [4] Lead water lines have also been known to be harmful since ancient times, though this is contested by industry trade groups within the United States.
Although lead has been banned from paint since 1978, lead poisoning still occurs. A medical expert explains the signs and symptoms of this public health problem.
Lead is a main-group element in the carbon group with the symbol Pb (from Latin: plumbum) and atomic number 82. Lead is a soft, malleable other metal. It is also counted as one of the heavy metals. Metallic lead has a bluish-white color after being freshly cut, but it soon tarnishes to a dull grayish color when exposed to air.
Over the past century, red poppies became a symbol to represent that ultimate sacrifice. As the holiday approaches, you'll notice these bright flowers everywhere: pinned onto clothing, tied onto ...