Lead

Running head : LEADFirst Name Last NameCollege / University you are enrolled atProfessor s NameSubject , a heavy , bluish - gray element , is one of the ball s oldest known metals . People have used tip for thousands of days as a building material and to make clayware and different objects . Today , wizard is important to many industries , in particular to those that produce chemicals , nuclear energy and petroleum (Jefferson laboratory , 2008 national wreak of Environmental Health Sciences , 2008In spite of its usefulness , head can be harmful . If too much get going builds up in the body , a condition called ace poisoning can result This condition occurs chiefly among pot who work in certain chemical plants or other factories or refineries where there are large quantities of lead feel or dust in the air (American Academy of paediatrics , 1999 Jefferson Lab , 2008 subject field Institute of Environmental Health Sciences , 2008 NSC .org , 2004 siege of Syracuse , 2005The amount of lead used is significantly massiveer than the sum of money of lead mined . Annual lead use worldwide is about 6 one thousand thousand short dozens (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 cycle lead from scrap products . Australia and the Soviet Union are the lead lead - mining countries . The United States ranks third and Canada , fourth (Jefferson Lab , 2008 depicted object Institute of Environmental Health Sciences , 2008Pure lead is fruity and has little strength . 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 mho 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 eroding 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 type , Pb , comes from the Latin word for lead , plumbum . melts at 327 .5 C and boils at 1740 C . At 20 C its tightfistedness 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 delicate lead and lead compounds , and certain parts of them are make of a lead - antimony alloy . Storage batteries deliver 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: Orderessay

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