Lead

Running head : LEADFirst Name Last NameCollege / University you are enrolled atProfessor s NameSubject , a heavy , bluish - gray element , is one of the humanity s oldest known metals . People have used bestow for thousands of years as a building material and to make clayware and otherwise objects . Today , call for is important to many industries , peculiarly to those that produce chemicals , nuclear energy and petroleum (Jefferson lab , 2008 subject constitute of Environmental Health Sciences , 2008In spite of its usefulness , offer can be harmful . If too much head builds up in the body , a condition called curb poisoning can result This condition occurs chiefly among large number who work in certain chemical plants or other factories or refineries where there are large quantities of lead fume or dust in the air (American Academy of pediatrics , 1999 Jefferson Lab , 2008 theme Institute of Environmental Health Sciences , 2008 NSC .org , 2004 siege of Syracuse , 2005The amount of lead used is significantly bang-uper than the beat of lead mined . Annual lead use oecumenical is about 6 one million million million short lashings (5 .4 million metric tons , 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 scrap 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 finespun 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 strength 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 south to produce lead sulfide , also called galena (Jefferson Lab , 2008 National Institute of Environmental Health Sciences , 2008 is highly malleable- that is , it can be hammered or pressed into thin sheets . also possesses great ductility , the ability to be permanently stretched without breaking . It resists corroding 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 chemical figure , Pb , comes from the Latin word for lead , plumbum . melts at 327 .5 C and boils at 1740 C . At 20 C its constriction is 11 .35 grams per cubic centimeter (Jefferson Lab , 2008 National Institute of Environmental Health Sciences , 2008The largest single use of lead is in the manufacture of lead - acid storage batteries . These batteries contain plain lead and lead compounds , and certain parts of them are do of a lead - antimony alloy . Storage batteries provide 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 generous essay, order it on our website: Ordercustompaper.com

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