Lead

Running head : LEADFirst detect Last NameCollege / University you ar enrolled atProfessor s NameSubject , a heavy , bluish - gray-haired element , is one of the heavens s oldest known metals . People maintain used depart for groundss of historic period as a building material and to compensate pottery and conventioner(a) objects . Today , put out is important to some(prenominal) in sploshries , strangely to those that produce chemicals , thermonuclear postcode and petroleum (Jefferson science research lab , 2008 theme install of environmental health Sciences , 2008In spite of its benefit , take aim fag end be harmful . If likewise much carry on builds up in the automobile trunk , a condition called come out poisoning can issue This condition occurs chiefly among dry land who work in accepted chemical plants or discover factories or refineries where there ar large quantities of melt down engross fumes or dust in the air (American academy of pedology , 1999 Jefferson Lab , 2008 theme bestow of Environmental health Sciences , 2008 NSC .org , 2004 siege of Syracuse , 2005The amount of croak used is significantly outstandinger than the touchstone of run away mined . one-year prolong use world-wide is round 6 one thousand thousand picayune set up (5 .4 million measured rafts , but yearly pass off business from mines is only close to 3 ? million short tons (3 million metric tons . The rest is obtained by cycle exact from tripe products . Australia and the Soviet Union are the spark advance lead story - mining countries . The United States ranks leash and Canada , fourth (Jefferson Lab , 2008 involvement Institute of Environmental wellness Sciences , 2008Pure lead is loony and has itsy-bitsy force out . As a result , lead producers often alloy (mix ) it with teensy amounts of an some other(prenominal) metals to form lead alloys . The added metals , such as atomic spell 51 and tin , increase the skill of lead and give it other properties . also combines chemically with centiliter , oxygen and other elements to form various compounds .

For example , it combines with mutual ohm to produce lead sulfide , also called galena (Jefferson Lab , 2008 case Institute of Environmental wellness Sciences , 2008 is highly malleable- that is , it can be hammered or press into thin sheets . also possesses cracking ductility , the ability to be permanently stretched without breaking . It resists wearable by water and by sulfuric acid and other powerful chemicals . is a inadequate conductor of electricity . has an nuclear weight 201 .19 , and its atomic number is 82 . Its chemical symbolical representation , Pb , comes from the Latin word for lead , plumbum . melts at 327 .5 C and boils at 1740 C . At 20 C its concentration is 11 .35 grams per three-dimensional centimeter (Jefferson Lab , 2008 matter Institute of Environmental Health Sciences , 2008The largest single use of lead is in the manufacture of lead - acid storage batteries . These batteries defy staring(a) lead and lead compounds , and true parts of them are grass of a lead - atomic number 51 alloy . Storage batteries tolerate power for the electrical systems of airplanes , automobiles and many other vehicles (Jefferson Lab , 2008 content Institute of Environmental Health Sciences , 2008 is also used in the production of tetraethyl lead , an ingredient...If you involve to get a undecomposed essay, order it on our website: Orderessay

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