Lead

Running head : LEADFirst Name Last NameCollege / University you are enrolled atProfessor s NameSubject , a heavy , bluish - gray element , is one of the field s oldest known metals . People have used depart for thousands of historic period as a building material and to make pottery and former(a) objects . Today , unfold is important to many industries , oddly to those that produce chemicals , nuclear energy and petroleum (Jefferson science lab , 2008 theme install of Environmental Health Sciences , 2008In spite of its usefulness , take aim can be harmful . If too much carry on builds up in the body , a condition called bear poisoning can result This condition occurs chiefly among commonwealth who work in certain chemical plants or separate factories or refineries where there are large quantities of lead exhaust fumes or dust in the air (American Academy of pedology , 1999 Jefferson Lab , 2008 theme Institute of Environmental Health Sciences , 2008 NSC .org , 2004 siege of Syracuse , 2005The amount of lead used is significantly outstandinger than the measuring of lead mined . Annual lead use world-wide is about 6 one thousand thousand short piles (5 .4 million metric tons , but yearly lead business from mines is only about 3 ? million short tons (3 million metric tons . The rest is obtained by cycle lead from scrap products . Australia and the Soviet Union are the spark advance lead - mining countries . The United States ranks third and Canada , fourth (Jefferson Lab , 2008 matter Institute of Environmental Health Sciences , 2008Pure lead is loony and has little force out . 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 reciprocal ohm 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 wearing 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 symbolic 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 National Institute of Environmental Health Sciences , 2008The largest single use of lead is in the manufacture of lead - acid storage batteries . These batteries contain staring(a) lead and lead compounds , and certain parts of them are make of a lead - antimony alloy . Storage batteries offer 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 expert essay, order it on our website: Ordercustompaper.com

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