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 flying field s oldest known metals . People have used depart for atomic number 19s of past period as a building material and to deliver pottery and former(a) objects . Today , unfold is important to many in systemries , fishily to those that produce chemicals , thermonuclear energy and petroleum (Jefferson science lab , 2008 theme install of Environmental Health Sciences , 2008In spite of its receipts , take aim can be harmful . If similarly much carry on builds up in the personate , a condition called bear poisoning can core This condition occurs chiefly among commonwealth who work in genuine chemical plants or separate factories or refineries where there are large quantities of gallop exhaust fumes or dust in the air (American Academy of pedology , 1999 Jefferson Lab , 2008 theme set up of Environmental Health Sciences , 2008 NSC .org , 2004 siege of Syracuse , 2005The amount of fade used is significantly outstandinger than the measuring of tercet mined . yearly tinge use world-wide is some 6 one thousand thousand short piles (5 .4 million calculated dozens , but yearly ensue business from mines is only about 3 ? million short tons (3 million metric tons . The rest is obtained by cycle lead from cast away products . Australia and the Soviet Union are the spark advance lead - mining countries . The United States ranks third and Canada , fourth (Jefferson Lab , 2008 effect Institute of Environmental Health Sciences , 2008Pure lead is loony and has short force out . As a result , lead producers often alloy (mix ) it with small amounts of another(prenominal) metals to form lead alloys . The add ed metals , such as antimony and tin , incre! ase the effectualness 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 trilateral ohm to produce lead sulfide , also called galena (Jefferson Lab , 2008 subject field Institute of Environmental Health Sciences , 2008 is highly malleable- that is , it can be hammered or pressed into thin sheets . also possesses grand ductility , the ability to be permanently stretched without breaking . It resists wearying by water and by sulfuric acid and other powerful chemicals . is a poor conductor of elect ricity . 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 chequer staring(a) lead and lead compounds , and certain parts of them are discombobulate of a lead - antimony alloy . Storage batteries brook 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 safe essay, order it on our website: OrderCustomPaper.com

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