Lead and environment

Some materials are so commonplace that we take them for granted. ane of those materials is a grayish metal that has been with us for thousands of years. That metal is occupy, suave one of the worlds virtually useful substances, and one that never ceases to reign a single-valued function in human society.          move has the atomic symbol of Pb (for plumbum, jumper lead in Latin). The atomic derive for lead is 82 and the atomic mass is 207.19 AMU. It melts at about(predicate) 327.502 oC and boils at 1740 oC. Lead is a heavy, ductile, soft, gray solid. It is soluble in nitric acid and insoluble in wet. It is bring in North, aboriginal and South America, Australia, Africa and Europe. In modern times, lead has found a wide chain of mountains of uses, and world demand for lead and its products has steadily increased. Leads usefulness stems from the metals more desirable properties: softness, high density, minor melting point, ability to block radi ation, enemy to corrosion, readiness to constitute alloys and chemical compounds, and ease of recycling. Its versatility, as substantially as its somatogenetic and chemical properties, accounted for its extensive use. Lead can be rolled into sheets which can be made into rods and pipes. It can as sound be molded into containers and mixed with other metallic elements.         Lead was utilize in ancient times for making coinage, art objects and water pipes. One of the first known toxic substances, lead was use by the Romans for lining aqueducts and in glazes on containers used for food and wine repositing; and it is suspected to have resulted in widespread lead poisoning. Members of the famous Franklin Expedition to the Northwest passage in the mid-1840s met a similar fate, being poisoned from lead in solder, astray used at the time to seal tins... If you wishing to get a proficient essay, order it on our we bsite: OrderCustomPaper.com

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