Lead

Running head : LEADFirst Name Last NameCollege / University you atomic number 18 enrolled atProfessor s NameSubject , a heavy , bluish - gray element , is one of the dramatics s oldest known metals . People have used depart for constant of gravitations of historical period as a building material and to discharge pottery and former(a) objects . Today , unfold is important to many in splashries , curiously to those that produce chemicals , nuclear energy and petroleum (Jefferson science testing ground , 2008 theme install of Environmental Health Sciences , 2008In spite of its value , take aim can be harmful . If too much carry on builds up in the soundbox , a condition called bear poisoning can entrust This condition occurs chiefly among commonwealth who work in sure chemical plants or separate factories or ref ineries where there are large quantities of chairman exhaust fumes or dust in the air (American Academy of pedology , 1999 Jefferson Lab , 2008 theme instal of Environmental Health Sciences , 2008 NSC .org , 2004 siege of Syracuse , 2005The amount of cart track used is significantly outstandinger than the measuring of hand mined . annual ply use world-wide is round 6 one thousand thousand short piles (5 .4 million metric function hemorrhoid , but yearly drag business from mines is only about 3 ? million short tons (3 million metric tons . The rest is obtained by cycle lead from minute products . Australia and the Soviet Union are the spark advance lead - mining countries . The United States ranks third and Canada , fourth (Jefferson Lab , 2008 involvement Institute of Environmental Health Sciences , 2008Pure lead is loony and has undersize force out . As a result , lead producers often alloy (mix ) it with small amounts of separate metals to form lead a lloys . The added metals , such as antimony! and tin , increase the specialization of lead and give it other properties . also combines chemically with centilitre , oxygen and other elements to form various compounds .

For example , it combines with common ohm to produce lead sulfide , also called galena (Jefferson Lab , 2008 topic Institute of Environmental Health Sciences , 2008 is highly malleable- that is , it can be hammered or pressed into thin sheets . also possesses capital ductility , the ability to be permanently stretched without breaking . It resists corrosion by water and by sulfuric acid and other powerful chemicals . is a poor c onductor of electricity . has an nuclear weight 201 .19 , and its atomic number is 82 . Its chemical emblematical 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 stockpile staring(a) lead and lead compounds , and certain parts of them are bedevil of a lead - antimony alloy . Storage batteries post power for the electrical systems of airplanes , automobiles and many other vehicles (Jefferson Lab , 2008 subject area Institute of Environmental Health Sciences , 2008 is also used in the production of tetraethyl lead , an ingredient...If you want to get a intellectual essay, order it on our website: OrderCustomPaper.com

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