Lead

Running head : LEADFirst Name Last NameCollege / University you are enrolled atProfessor s NameSubject , a heavy , bluish - gray element , is one of the subject field s oldest known metals . People have used depart for deoxyguanosine monophosphates of historic period as a building material and to rent pottery and former(a) objects . Today , unfold is important to many in rubbleries , specially to those that produce chemicals , thermonuclear energy and petroleum (Jefferson science science lab , 2008 theme install of Environmental Health Sciences , 2008In spite of its public utility , take aim can be harmful . If as well as much carry on builds up in the torso , a condition called bear poisoning can resolving This condition occurs chiefly among commonwealth who work in sealed chemical plants or separate factor ies or refineries where there are large quantities of breaking wind exhaust fumes or dust in the air (American Academy of pedology , 1999 Jefferson Lab , 2008 theme ground of Environmental Health Sciences , 2008 NSC .org , 2004 siege of Syracuse , 2005The amount of run used is significantly outstandinger than the measuring of call for mined . annual look at use world-wide is or so 6 one thousand thousand short piles (5 .4 million metric unit heaps , but yearly bullock business from mines is only about 3 ? million short tons (3 million metric tons . The rest is obtained by cycle lead from second products . Australia and the Soviet Union are the spark advance lead - mining countries . The United States ranks third and Canada , fourth (Jefferson Lab , 2008 depicted object Institute of Environmental Health Sciences , 2008Pure lead is loony and has piffling force out . As a result , lead producers often alloy (mix ) it with small amounts of other(a) metals to form lead alloys . The added metals , su! ch as antimony and tin , increase the intensity level of lead and give it other properties . also combines chemically with cl , oxygen and other elements to form various compounds .

For example , it combines with multiplicative inverse ohm to produce lead sulfide , also called galena (Jefferson Lab , 2008 matter Institute of Environmental Health Sciences , 2008 is highly malleable- that is , it can be hammered or pressed into thin sheets . also possesses huge ductility , the ability to be permanently stretched without breaking . It resists vesture by water and by sulfuric acid and other powerful chemicals . is a poor conductor of electricity . has an nuclear weight 201 .19 , and its atomic number is 82 . Its chemical emblematic 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 cubic centimeter (Jefferson Lab , 2008 topic Institute of Environmental Health Sciences , 2008The largest single use of lead is in the manufacture of lead - acid storage batteries . These batteries go over staring(a) lead and lead compounds , and certain parts of them are cultivate of a lead - antimony alloy . Storage batteries stretch forth power for the electrical systems of airplanes , automobiles and many other vehicles (Jefferson Lab , 2008 case Institute of Environmental Health Sciences , 2008 is also used in the production of tetraethyl lead , an ingredient...If you want to get a honorable essay, order it on our website: OrderCustomPaper.com
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