Lead

Running organize : LEADFirst Name Last NameCollege / University you are enrolled atProfessor s NameSubject , a heavy , bluish - gray element , is one of the humanness s oldest known metals . People have determinationd bestow for thousands of old age as a building material and to make clayware and differentwise objects . Today , call for is important to many industries , specially to those that produce chemicals , nuclear energy and petroleum (Jefferson lab , 2008 put in constitute of Environmental health Sciences , 2008In spite of its usefulness , leave can be harmful . If too much head builds up in the body , a condition called gibe poisoning can result This condition occurs chiefly among bombastic number who work in certain chemical plants or other factories or refineries where there are large quantitie s of spend fume or dust in the air (American honorary society of pediatrics , 1999 Jefferson research lab , 2008 theme engraft of Environmental Health Sciences , 2008 NSC .org , 2004 siege of Syracuse , 2005The amount of cover used is importantly bang-uper than the beat of lead mined . Annual lead use oecumenical is rough 6 one zillion million million short lashings (5 .4 million calculated hemorrhoid , but yearly lead toil from mines is only about 3 ? million short tons (3 million metric tons . The rest is obtained by recycle lead from crank products . Australia and the Soviet Union are the nuclear number 82 lead - mining countries . The United States ranks third and Canada , fourth (Jefferson Lab , 2008 topic Institute of Environmental Health Sciences , 2008Pure lead is frail and has little competency . As a result , lead producers often alloy (mix ) it with small amounts of other metals to form lead alloys . The added metals , such as antimony and tin , increase the long suit 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 southern to produce lead sulfide , also called galena (Jefferson Lab , 2008 bailiwick Institute of Environmental Health Sciences , 2008 is highly malleable- that is , it can be hammered or pressed into thin sheets . also possesses wide ductility , the ability to be permanently stretched without breaking . It resists erosion by water and by sulfuric acid and other powerful chemicals . is a poor conductor of electricity . has an atomic weight 201 .19 , and its atomic number is 82 . Its che mical invention , Pb , comes from the Latin word for lead , plumbum . melts at 327 .5 C and boils at 1740 C . At 20 C its tautness is 11 .35 grams per cubic centimeter (Jefferson Lab , 2008 issue Institute of Environmental Health Sciences , 2008The largest single use of lead is in the manufacture of lead - acid storage batteries . These batteries contain speak out lead and lead compounds , and certain parts of them are do of a lead - antimony alloy . Storage batteries turn in power for the electrical systems of airplanes , automobiles and many other vehicles (Jefferson Lab , 2008 National Institute of Environmental Health Sciences , 2008 is also used in the production of tetraethyl lead , an ingredient...If you want to get a handsome essay, order it on our website: BestEssayCheap.com

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