Paris M. Dunn English 10 AP Prep 23 September 2013 The Precious and Prevailing Times of the Puritans and the Amish Many hands get things done. When everyone contributes they reach their goal faster and more efficiently. The Puritans came about during the 1600’s‚ and this astounding group of people was portrayed by the four tenets: industriousness‚ temperance‚ sobriety‚ and simplicity. Industriousness was the most important to the Puritans during their time; because they used both physical
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Electron Configurations and the Periodic Table Practice Problems History of the Atom CW: 1. Why is it not possible for an electron to continue in a set orbit around the nucleus like a planet around the sun? HW: 2. Explain how emission spectra of gasses helped scientists to determine electrons traveled in energy levels. Energy Level Diagram CW: 3. Draw the energy level diagram for Iron. 4. Draw the energy level diagram for Sulfur. 5. Draw the energy level diagram for Argon 6. Draw the
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their removal from the body. Chelation is widely used to expel excess or toxic substances metals from the body before they can cause any damage to the body. Chelation Therapy works on the principle that when a complex amino acid called Ethylenediaminetetraacetic acid (EDTA)‚ comes into contact with various positively charged heavy metals such as zinc‚ copper‚ magnesium‚ iron and calcium; it clings to the metal ions and forms a stable ring like structure. This compound is expelled through the body
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hobby of metal detecting‚ the best way to develop the basic skills necessary and be successful in finding objects that are desirable is to purchase a beginner metal detector. While there are many metal detectors available on the market‚ the most suitable type for beginners are detectors that are simple to use and do not have a lot of advanced features and functions that can be confusing and overwhelming to the beginner. If you are interested in getting started in the enjoyable hobby of metal detecting
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V+5 and why? (1) 5 How cathode rays are originated in the discharge tube and how their origin differs from the origin of anode rays? 6 When is a cation highly polarizing? Which alkali metal has the highest polarizing power? (1) 7.Why is KO2 paramagnetic? (1) 8 Potassium and Caesium are used in photoelectric cells
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an irritant. Group 2 elements Calcium Strontium Magnesium Beryllium Barium Radium Introduction: The Group 2 elements are all metals with a shiny‚ silvery-white colour having 2 electrons in their outermost shell. The alkaline earth metals are high in the reactivity series of metals‚ but not as high as the alkali metals of Group 1. The metals of Group 2 are harder and denser than sodium and potassium‚ and have higher melting points. These properties are due largely to the presence of
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other alkali metals. Because these elements are very similar chemically‚ their separation presented numerous problems before the advent of ion-exchange methods and ion-specific complexing agents such as crown ethers. Once pure salts have been prepared‚ it is a straightforward task to convert them to the free metal. This can be done by electrolysis of the fused cyanide or by reduction with calcium or sodium followed by fractional distillation. Properties Rubidium is an alkali metal in group IA of
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Mary Lastes Professor DeSouza College Writing 29 March 2013 1. Different Genres of Metal Music 2. American Writers and Poets I feel either one of these topics would work well because I have a great love of music. Through my life since I was nine years old‚ I have seen a lot of Rock bands perform and have felt a close connection with them through their music. When writing I prefer to brainstorm‚ because I think about how the reader would get the most pleasure and knowledge from
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Observations Element Observations Metal or Non-Metal Sodium -Lustrous -Forms oxides on surface rapidly -A soft metal -silvery-white colour Metal Magnesium -Lustrous -Forms oxides on surface -Silvery-white colour -Malleable but less than alkali metals Metal Aluminium -Silvery-white metal -Malleable but less than alkali earth metals -Forms oxide on surface Metal by observation‚ metalloid by properties Sulphur -Soft pale-yellow powder -It is odourless Non-metal Reactions with water:
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exam) There are two key reasons for using thermoplastic composites: * save time & handling costs in production * eliminate labour-intensive riveting & bonding * can produce large profile sections that are some 20 % lighter than metal & alloys. * materials are exceptionally stiff and can tolerate vibrations A380 (largest passenger plane) - 25 % of the structure & components are composites. And in the next generation of aircraft‚ the content of composites will double
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