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Free research papers and essays on topics related to: zinc

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  • Zinc By Jason Gomez - 895 words
    ZINC by JASON GOMEZ Zinc is a chemical element with the symbol Zn. It is a low-melting metal that belongs to Group IIb (zinc group) of the periodic table. The atomic number of zinc is 30. With an atomic weight of 65.39, zinc makes up an average of 65 grams of every ton of Earth's crust, which makes it a little more abundant than copper. The melting point of zinc is 420 degrees Celsius and its boiling point is 907 degrees Celsius (Britannica Online). Zinc is the second most common trace metal, after iron, that is found naturally in the human body. It is also the third most used nonferrous metal (after aluminum and copper), of which the U.S. consumes more than one million metric tons annually ...
    Related: jason, zinc, geological survey, century china, quantity
  • Acid - 1,218 words
    Acid Rain Acid rain is a serious problem with disastrous effects. Each day this serious problem increases. Many people believe that this issue is too small to deal with right now, and others believe it should be met head on. In the following paragraphs I will be discussing the impact of acid rain effects on wildlife and how our atmosphere is being destroyed. Causes Acid rain is a cancer, eating into the face of Eastern Canada and the North Eastern United States. In Canada, the main sulphuric acid sources are non-ferrous smelters and power generation. On both sides of the border, automobiles are the main sources for nitric acid (about 40% of the total). Power generating plants, industrial com ...
    Related: acid, acid rain, great lakes, disease prevention, bear
  • Acid Rain And North America - 1,891 words
    Acid Rain And North America In the past century, one of the greatest threats to North America's aquatic ecosystem has been the widespread acidification of hundreds of thousands of waterways. Acid rain has effected plant and animal life within aquatic ecosystems, as well as microbiologic activity by affecting the rates of decomposition and the accumulation of organic matter. What causes this poisonous rain, and what can be done to improve North America's water quality and prevent future catastrophes? To answer these questions, we must first examine the cause and formation of acid rain, as well as understand ways to decrease or prevent its formation. Formation of acid rain. Acid deposition, mo ...
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  • Air Pollution - 375 words
    Air pollution Heres a little introduction to this project. There are always two ways to look at something. There is the good way, which in this case would mean looking at all the positive effects that human intervention has created, These are very few if there are any at all! Also, there is the other way. This would be the bad way consisting of basic criticism of all the negative effects that human intervention has caused. These are quite a few and therefore we shall talk about them. Fortunately for the Amazonian forest, I am not going to write about every single thing connected to the negative effects on the environment, but I will talk about several cases, all connected some how to polluti ...
    Related: air pollution, pollution, water pollution, carbon monoxide, positive effects
  • Air Polution - 390 words
    Air Polution AIR POLLUTION Some causes of air pollution are Smog, Acid Rain and Nuclear Problems. Smog is a word that discribes a mixture of smoke and fog. In some places you are advised to stay indoors when smog is bad. One of these places is Mexico City in Mexico. It has some the worst air pollution in the world. If you were to fly over Mexico City, you would be able to see the smog hanging over the city. As you were landing you would be able to smell and see the smog in side the airplane.Common air pollution is carbon monoxide which is found in most city streets.Carbon monoxide is mostly from cars and is highly poisonous. The combustion of coal, oil, and gasoline accounts for much of the ...
    Related: carbon monoxide, water supply, fossil fuel, sulfur, waste
  • Aluminum - 1,420 words
    Aluminum Aluminum is one of a number of soft metals that scientists call poor metals. It can be shaped and twisted into any form. It can be rolled into thick plates for armored tanks or into thin foil for chewing gum wrappers. It may be drawn into a wire or made into cans. Aluminum is a generally popular metal because it does not rust and it resists wear from weather and chemicals. (Bowman, 391) Aluminum is an element. Its atomic number is thirteen and its atomic weight is usually twenty-seven. Pure aluminum melts at 660.2C and boils at 2500C. Its density is 2.7 grams per cube centimeter. Aluminum is never found uncombined in nature. (Bowman, 391) Aluminum is a very useful metal that is ligh ...
    Related: aluminum, food and drink, electric power, atomic number, resist
  • Arsenic - 1,749 words
    Arsenic Element 33: Arsenic Abstract Arsenic is element 33 on the periodic table and is in Group 15. Arsenic is obviously an extremely poisonous element; however, some people have found arsenic to have a restorative effect on them. Chemically, arsenic is a metalloid. Two common forms of arsenic are gray and yellow. (see Figure 1-A) Element 33 has an atomic weight of 74.9216 and the chemical symbol of As. It boils at 613C, melts at 817C, and has a density of 5.72. (see Figure 2-A) The element has been known for centuries and can be easily obtained from ores such as arsenopyrite (FeAsS), realgar (As2S2), orpiment (As2S3), and arsenic trioxide (As2O3). There are many uses for arsenic. Among the ...
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  • Atomic Theory - 1,225 words
    Atomic Theory In ancient Greek the word atom meant the smallest indivisible particle that could be conceived. The atom was thought of as indestructible; in fact, the Greek word for atom means not divisible. Knowledge about the size and make up of the atom grew very slowly as scientific theory progressed. What we know/theorize about the atom now began with a core theory devised by Democrotus, a Greek philosopher who proposed that matter consisted of various types of tiny discrete particles and that the properties of matter were determined by the properties of these particles. This core theory was then modified and altered over years by Dalton, Thompson, Rutherford, Bhor, and Chadwick. The ato ...
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  • Austria - 1,042 words
    Austria Austria Austria is the republic in central Europe. It is about 360 miles long and has an area of about 32,378 square miles. Vienna is the countrys capital and largest city. Austria is predominantly a mountainous country, with an average elevation of about 3000 feet. Most of the land falls within the eastern part of the Alps. In general the major mountain ranges of Austria run in an eastern-western direction and are separated from one another by large valleys. The northernmost line of ranges includes the North Tirol Alps and the Salzburg Alps. Among the central range is the Hohe Tauern, which tops in the Grossglockner, the highest elevation in the country. The Pasterze Glacier, one of ...
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  • Brisbane River - 1,955 words
    Brisbane River 1.0 INTRODUCTION The Brisbane River has flowed for over 400 million years. The catchment of the Brisbane River has overcome phases of flood and drought while its origins altered as the surrounding land changed overtime. In 1823, John Oxley entered the river for the first time. At the time the river appeared clean and unpolluted. Oxley immediately recognised the river's potential as a site for new settlement, through his recommendation the city of Brisbane was established in 1825. The Brisbane River extends inland for 300km reaching its source at the foothills of the Great Dividing Range. The river's catchment occupies an area of approximately 30,000km2 and releases it waters i ...
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  • California - 1,064 words
    California California was the 31st state, which received its statehood on Sept. 9, 1850 , and nickname is the Golden State. The bird is the California Valley Quail; the flower is the golden poppy; the tree is the California Redwood; and the state motto is Eureka (I have Found It). There are many sights to see in the state of California. Besides all the big metropolitan cities, there is the Golden Gate Bridge, Chinatown, and Fishermans Wharf in San Francisco. Also there is the San Diego Zoo, Sea World, Yosemite and Sequoia National Park, and any of the mountains in the northern part of the state. In addition to that, you can see Disneyland and the countless numbers of television and movie stu ...
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  • Chemical Equilibria - 1,497 words
    Chemical Equilibria Darryl Fagan Pd. 4 01-20-00 AP Chemistry An Activity Series Chemistry Lab 5 Introduction; In this experiment you will study some metals and some nonmetals to find their relative reactivity. A ranking according to reactivity is called an activity series. For example, an activity series containing the elements calcium, gold and iron would put the reactive calcium at the top, iron in the middle, and the unreactive gold at the bottom. If a piece of iron metal is placed in a solution of gold nitrate, the iron will dissolve forming positive ions while the solid gold metal appears. The more reactive metal will displace ions of the less reactive metal from solution. The less reac ...
    Related: mixture, ions, observing
  • Corrosion And Rusting - 1,057 words
    ... Fe2+ (aq) + 2OH- Fe(OH)2 (s) The precipitate is rapidly oxidized by dissolved oxygen to form iron (III) hydroxide. 4Fe(OH)2 (s) + O2 (aq) + 2H2O (l) 4Fe(OH)3 (s) On standing, this changes to rust, a reddish brown solid. Rust is in fact hydrated iron (III) oxide with variable composition (Fe2O3 nH2O). Factors that speed up rusting 1) Presence of electrolytes Acid solutions make rusting go faster. In industrial areas where air is seriously polluted, there are high concentrations of carbon dioxide, sulfur dioxide and nitrogen dioxide. These gases dissolve in rain water to give "acid rain", which makes iron objects rust faster. Sodium chloride also makes iron rust more quickly. For exampl ...
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  • Crystals - 1,487 words
    Crystals Crystals What is a crystal? A crystal is a solid substance with definite geometric shapes and molecules that are arranged in a repeating pattern (Comptons ). Crystals have fixed angles between its faces, which have distinct edges. If the faces of a crystal can reflect light, then it will sparkle (Stangle). Crystals have constant angles because of the regular arrangement of its particles. There are seven types of crystals: cubic, tetragonal, orthorhombic, hexagonal, trigonal, monoclinic, and triclinic (Dr. Boyle). Crystals are classified by the shapes of their lattice or the regular, periodic configuration of particles (American Heritage). There are two different types of lattices. T ...
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  • Diamond - 1,187 words
    Diamond The unique nature of diamond is heavily dependent upon its composition, crystal structure, and mechanical, thermal, and electromagnetic properties.1 Of those dependencies, composition exacts the most influence over the characteristics. Crystal structure is the repeating pattern of diamonds composition, and each of the properties are the result of molecular interaction which is determined by composition. Therefore, composition is paramount in the determination of the qualities of diamond. Before its discovery, adamantane was known as decaterpene, the name applied by Decker to his tricyclic hydrocarbon. Decker believed that his decaterpene was similar in structure as the diamond lattic ...
    Related: diamond, mass production, natural process, scientific community, proceed
  • Ecuador - 501 words
    Ecuador Ecuador I picked this country because when we saw the video on Ecuador it made me want to learn more about the country. Ecuador has a population approximately 10,500,000 and is a little bit smaller than Nevada. 85% of the people aged 15 or older are literate. The Galapagos Islands are also part of Ecuador and the total population is about 10,000 people. Guayaquil is the most densely populated city which has a population of 1,800,000. The 2nd most densely populated city is Quito, the country's capital, which has a population of 1,200,000. Ecuador is divided into 21 providence's and the government system is about the same as ours, with an Executive Office, a Legislative Office, and a J ...
    Related: ecuador, francisco pizarro, mineral resources, official language, radio
  • Effects Of Acid Rain On North Americas Aquatic Ecosystems - 1,898 words
    Effects Of Acid Rain On North America's Aquatic Ecosystems In the past century, one of the greatest threats to North America's aquatic ecosystem has been the widespread acidification of hundreds of thousands of waterways. Acid rain has effected plant and animal life within aquatic ecosystems, as well as microbiologic activity by affecting the rates of decomposition and the accumulation of organic matter. What causes this poisonous rain, and what can be done to improve North America's water quality and prevent future catastrophes? To answer these questions, we must first examine the cause and formation of acid rain, as well as understand ways to decrease or prevent its formation. Formation of ...
    Related: acid, acid rain, americas, aquatic, aquatic ecosystems, ecosystems, north america
  • Egypt - 534 words
    Egypt I am visiting the country of Egypt. Egypt is a country in Africa. The Egyptian name for Egypt is jumhuriyat misr al-arabiyah, misr is the Egyptian word for Egypt. The national capital is Cairo. The location of Egypt is in northern Africa, bordering the Mediterranean Sea, between Libya and the Gaza strip. Egyptian land is a total of 995450 sq. Km and 6,00 sq. Km. Egypt is almost more than three times the size of New Mexico. The coastline is 2,450 km. Climate: the climate is desert type, hot, dry summers with moderate winters. The temperatures during the summer range from 114 degrees during day light to a minimum of 42 degrees after sunset. During the winter season the temperature drops ...
    Related: egypt, new mexico, gaza strip, natural hazards, catholic
  • Electric Cars - 1,506 words
    Electric Cars Electric Cars History: Early electric vehicles may have appeared as early as 1830. Scottish inventor Robert Davidson constructed the world's first prototype electric vehicle in 1837, but historians generally credit J.K. Starley, an English inventor, and Fred M. Kimball of Boston with building the first practical electric cars in 1888. Later in the in the decade, William Morrison of Des Moines, Iowa, constructed his version of the electric vehicle in 1891. His vehicle required 24 storage battery cells, took 10 hours to charge, and could run for 13 hours. It could carry up to 12 people and had a 4-horsepower motor. His car could reach speeds up to 14 miles per hour. Morrison, how ...
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  • Electroplating - 686 words
    Electroplating ELECTROPLATING The problem was to discover which electrolyte is the best. An electrolyte is a liquid you electroplate in. Water, vinegar, and vinegar with salt stirred in it were the three electrolytes used. Which is the best electrolyte for copperplating a nickel? Is there a difference between these electrolytes or are they all the same? Electroplating is the process of coating with metal by means of electric current. When electroplating is really used it is more complicated than the process used in this experiment. In a real plating tank the cathode, or metal to be plated, is negatively charged. The anode, or plating metal, is charged positively. Then some of the atoms on th ...
    Related: corrosion, electrolyte, salt
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