Zinc Essay Example For Students

Zinc Essay Zinc is a chemical element with the symbol Zn. It is a low-melting metal thatbelongs to Group IIb (zinc group) of the periodic table. The atomic number ofzinc is 30. With an atomic weight of 65.39, zinc makes up an average of 65 gramsof every ton of Earths crust, which makes it a little more abundant thancopper. The melting point of zinc is 420 degrees Celsius and its boiling pointis 907 degrees Celsius (Britannica Online). Zinc is the second most common tracemetal, after iron, that is found naturally in the human body. It is also thethird most used nonferrous metal (after aluminum and copper), of which the U.S. We will write a custom essay on Zinc specifically for you for only $16.38 $13.9/page Order now consumes more than one million metric tons annually (American Zinc Association). According to the U.S. Bureau of Mines, the average person will use 730 pounds ofzinc in his or her lifetime. Metallic zinc appeared much later in history thanthe other common metals. The Ancient Egyptians were the first to use zincalthough they did so unintentionally! They made their brass from copper oresthat were contaminated with zinc (Knapp, 4). There is some evidence thatthe Greeks knew of zincs existence. They called it pseudargyras, or falsesilver, but they had no method of producing it in quantity. The Romansproduced considerable quantities of brass, an alloy of zinc and copper, as earlyas 200 B.C. The metallurgists of India seem to have isolated the individualmetal as early as the 13th century; and by the 16th century, China had achievedlarge-scale production. In the West, commercial zinc production got under way bythe middle of the 18th century in England under the leadership of WilliamChampion (Britannica Online). The first complete study of zinc was published in1746 by Si gismund Marggraf, a German chemist (World Book). Canada is the leadingproducer of zinc followed by Australia, China, Peru, the U.S. and Mexico. In theU.S., mine production comes mostly from Alaska, Tennessee, New York, andMissouri (World Almanac, 151). There are 47 tons of zinc in one cubic mile ofseawater. Zinc deposits occur in two quite different ways: first, ashydrothermal or contact metamorphic deposits, and second, as sedimentarydeposits. Zinc was used as a component of brass until the 18th century. Morethan 50% of production is consumed in the preparation of alloys for die-castproducts, and in anticorrosion treatment of iron and steel (Skinner, 19). Alarge share of the zinc produced today is used for galvanizing iron and steel(that is, coating them with zinc to make them rustproof). For many purposes,zinc is simply flattened into sheets called rolled zinc. Thesesheets are used in the manufacture of many roofing products, refrigeratorlinings, and printing plates. The compounds of zinc have numerous uses. Becauseof its high heat conductivity, zinc oxide is used in rubber as a heatdissipater. It is also used in the making of cosmetics, plastics, skinointments, and soaps. Zinc sulfate is used in weed killers. Zinc sulfide hasbeen used in X-ray screens and in luminous dials for clocks and watches(Comptons Encyclopedia). Zinc is also used in electric batteries and isrequired for the normal growth and healing of plants and animals. Zinc can alsobe combined with other metals to form many other alloys (mixtures). For example,brass is an alloy of copper and zinc. Bronze is copper, tin, and zinc. Andnickel silver is copper, nickel, and zinc (World Book). The following statisticsare stated in the U.S. Geological survey, U.S. Dept. of the Interior. As ofmid-1996, the world mineral reserve for zinc was 330 million metric tons. U.S. .u2c675321afbd158c318580d873e57706 , .u2c675321afbd158c318580d873e57706 .postImageUrl , .u2c675321afbd158c318580d873e57706 .centered-text-area { min-height: 80px; position: relative; } .u2c675321afbd158c318580d873e57706 , .u2c675321afbd158c318580d873e57706:hover , .u2c675321afbd158c318580d873e57706:visited , .u2c675321afbd158c318580d873e57706:active { border:0!important; } .u2c675321afbd158c318580d873e57706 .clearfix:after { content: ""; display: table; clear: both; } .u2c675321afbd158c318580d873e57706 { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .u2c675321afbd158c318580d873e57706:active , .u2c675321afbd158c318580d873e57706:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .u2c675321afbd158c318580d873e57706 .centered-text-area { width: 100%; position: relative ; } .u2c675321afbd158c318580d873e57706 .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .u2c675321afbd158c318580d873e57706 .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .u2c675321afbd158c318580d873e57706 .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .u2c675321afbd158c318580d873e57706:hover .ctaButton { background-color: #34495E!important; } .u2c675321afbd158c318580d873e57706 .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .u2c675321afbd158c318580d873e57706 .u2c675321afbd158c318580d873e57706-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .u2c675321afbd158c318580d873e57706:after { content: ""; display: block; clear: both; } READ: Nutrition vs. sport performance EssayZinc Production, 1950-95 (in thousand metric tons) 1950 565,516 1989 275,8831960 395,013 1990 515,355 1965 554,429 1991 517,804 1970 484,560 1992 523,4401975 425,792 1993 488,283 1980 317,103 1994 570,162 1985 226,545 1995 601,000 In1950 the total production of zinc was 565,515 thousand metric meters. Theestimated total reserves for 1950 was 85,000,000 metric tons, but that wasbefore the enormous amount of native zinc was discovered in Australia (Skinner,62). In the year 2000, the projected total of zinc production is 550,000thousand metric meters and the total world reserve will be at an estimated320,500,000 metric tons. In the year 20 50, I expect the total production of zincto be around significantly greater than it was 100 years from then. Fromexamining the chart above, I have come to the conclusion that the world reservewill not be that greatly affected (considering the increasing

What Are Sample Essays?

What Are Sample Essays?When most people think about sample essays they think of the obvious, about how to craft a genius essay. They're so familiar with them that they almost think that everything you do on this course is just like writing a sample essay. But if you really dig into the matter and learn what sample essays are made of, then you'll find that it's far more complex than that.The whole idea behind sample essays is to answer the questions that you set in the beginning of the course. The questions range from basic ones to ones that might not even be considered on a resume. The main principle behind the way these questions are laid out in the course is that they will help you hone your skills at thinking through how to answer specific questions. By the time you're done with this course, you'll know how to handle a wide variety of questions when they come up, including how to write a great resume or a killer cover letter.The way sample essays are laid out is such that each que stion you address will end up being linked to a section of the text. The higher up the chapter or the section the question is, the more it's going to be linked to the main topic of the essay.While it might sound obvious, sample essays aren't actually written in an essay format at all. These kinds of essays are actually essays in microeconomics, which is a much simpler form of writing.Microeconomics is the study of how consumers interact with businesses to influence the economy. It's one of the most important aspects of any good study of business, because microeconomics is crucial for understanding the impact of government policy and regulation on the economy.It's important to understand how people interact with other people to develop simple rules that can be applied across the board, from running the banking industry to figuring out how to streamline a tax code. The way this works in sample essays is that by reading through an essay about sample macroeconomics, you'll learn how to formulate some simple rules and analyze those rules when applied to a particular scenario.These principles of sample essays are so fundamental that it's not enough to just learn how to do them; you need to be able to apply them to real-world situations. This means that if you really want to succeed in a college or university setting, you need to take a lot of classes in macroeconomics.