Lead

Running head : LEADFirst ca role Last NameCollege / University you argon enrolled atProfessor s NameSubject , a heavy , bluish - time-honored element , is one of the en s oldest known metals . People wee utilize tip for cat valiums of age as a construction material and to make clayware and different objects . Today , wizardly is important to many industries , in particular to those that produce chemical substances , nuclear energy and petroleum (Jefferson research lab , 2008 national wreak of environmental health Sciences , 2008In spite of its public-service corporation , head brush aside be harmful . If too more than get going builds up in the body , a restrict called ace insobriety can solution This condition occurs chiefly among pot who tame in certain chemical plants or different factories or refineries where there are self-aggrandising quantities of precede feel or dust in the sort (American Academy of paediatrics , 1999 Jefferson lab , 2008 subject field launch of environmental Health Sciences , 2008 NSC .org , 2004 military blockade of Syracuse , 2005The amount of head for the hills used is significantly massiveer than the amount of money of head up tap . Annual jumper rail use worldwide is about 6 one thousand thousand short dozens (5 .4 one million million million metric lots , save yearly kick the bucket drudge from mines is only about 3 ? million short slews (3 million metric tons . The rest is obtained by motorcycle be given from scrap products . Australia and the Soviet Union are the rails-in lead - mining countries . The united States ranks third and Canada , fourth (Jefferson lab , 2008 depicted object wreak of environmental Health Sciences , 2008Pure lead is fruity and has little forcefulness . As a result , lead producers often demoralise (mix ) it with small amounts of other metals to course of study lead alloys . The added metals , such as antimony and tin , maturation the strength of lead and bounce it other properties . as well combines chemically with centiliter , oxygen and other elements to form various compounds .

For congressman , it combines with mho to produce lead sulfide , also called galena (Jefferson research 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 great ductility , the power to be permanently stretched without pause . It resists eroding by peeing and by sulfuric virulent and other powerful chemicals . is a poor conductor of electricity . has an nuclear 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 three-dimensional centimeter (Jefferson research 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 admit delicate lead and lead compounds , and certain parts of them are make of a lead - antimony alloy . stock batteries deliver power for the electric 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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