Lead

Running go : LEADFirst Name Last NameCollege / University you are enrolled atProfessor s NameSubject , a heavy , bluish - gray element , is one of the beneficence s oldest known metals . People have economic consumptiond bestow for thousands of long time as a building material and to make pottery and differentwise objects . Today , call for is important to many industries , interrogatively to those that produce chemicals , nuclear energy and petroleum (Jefferson lab , 2008 yield constitute of Environmental health Sciences , 2008In spite of its usefulness , project can be harmful . If too much head builds up in the body , a condition called bottle up poisoning can result This condition occurs chiefly among puffy number who work in certain chemical plants or other factories or refineries where there are large quantities of demand fume or dust in the air (American honorary society of pediatrics , 1999 Jefferson science laboratory , 2008 theme impart of Environmental Health Sciences , 2008 NSC .org , 2004 siege of Syracuse , 2005The amount of ternion used is importantly bang-uper than the beat of triad mined . Annual lead use oecumenical is some 6 one one million million million million million short lashings (5 .4 million mensurable rafts , but yearly lead toil from mines is only about 3 ? million short tons (3 million metric tons . The rest is obtained by recycle lead from argufy products . Australia and the Soviet Union are the nuclear number 82 lead - mining countries . The United States ranks third and Canada , fourth (Jefferson Lab , 2008 topic Institute of Environmental Health Sciences , 2008Pure lead is delicate and has little competency . As a result , lead producers often alloy (mix ) it with small amounts of other metals to form lead alloys . The add ed metals , such as antimony and tin , incre! ase the ability of lead and give it other properties . also combines chemically with chlorine , oxygen and other elements to form various compounds .

For example , it combines with southbound to produce lead sulfide , also called galena (Jefferson Lab , 2008 subject Institute of Environmental Health Sciences , 2008 is highly malleable- that is , it can be hammered or pressed into thin sheets . also possesses commodious ductility , the ability to be permanently stretched without breaking . It resists damage 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 chem ical ascertain , Pb , comes from the Latin word for lead , plumbum . melts at 327 .5 C and boils at 1740 C . At 20 C its meanness is 11 .35 grams per cubic centimeter (Jefferson Lab , 2008 internal Institute of Environmental Health Sciences , 2008The largest single use of lead is in the manufacture of lead - acid storage batteries . These batteries contain opine lead and lead compounds , and certain parts of them are do of a lead - antimony alloy . Storage batteries succeed 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 freehanded essay, order it on our website: OrderEssay.net

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