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Lead is a chemical element with the symbol Pb (from the 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 … Meer weergeven Atomic A lead atom has 82 electrons, arranged in an electron configuration of [Xe]4f 5d 6s 6p . The sum of lead's first and second ionization energies—the total energy required to … Meer weergeven In space Lead's per-particle abundance in the Solar System is 0.121 ppb (parts per billion). This figure is two and a half times higher than that of Meer weergeven Prehistory and early history Metallic lead beads dating back to 7000–6500 BCE have been found in Asia Minor and may represent the first example of metal smelting. At that time lead had few (if any) applications due to its softness and dull … Meer weergeven Contrary to popular belief, pencil leads in wooden pencils have never been made from lead. When the pencil originated as a wrapped graphite writing tool, the particular type of graphite used was named plumbago (literally, act for lead or lead mockup). Meer weergeven Bulk lead exposed to moist air forms a protective layer of varying composition. Lead(II) carbonate is a common constituent; the sulfate or chloride may also be present … Meer weergeven The modern English word lead is of Germanic origin; it comes from the Middle English leed and Old English lēad (with the macron above the "e" signifying that the vowel sound of that letter is long). The Old English word is derived from the hypothetical … Meer weergeven As of 2014, production of lead is increasing worldwide due to its use in lead–acid batteries. There are two major categories … Meer weergeven http://www.csalloys.com/products-cerrobend-alloy.html WebLead is a soft bluish-grey metal with a bright lustre that is easily malleable. Lead is a versatile metal that is used in various industries such as the chemical industry, construction, military, automotive industry, medical industry. Lead is soft and can be cut with a knife and drawn into a wire and rolled into a sheet. rayzors classic barber shop