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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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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Clifton Metal Works Study Class Clifton Metal Works Study Class 1.- Coment on the current mission statement. Does it provide the strategic direction nesecary for success for this company? First it is necessary to know what elements are necessary to develop a mission and what are the goals of the mission statement for a company. The mission statement of a company defines its reason for existence‚ it should answer the question: "Why
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present age there is a rapid increase of contaminants in the environment‚ but one of the major global concerns is the heavy metal concentrations in the environment as a result of man’s activities and since the biosphere is a closed system this heavy metals remains on earth and continuously increase as the human population increase. The acute and chronic effects of these heavy metals especially lead have been a worldwide concern. In fact in April 2000 the use of leaded gasoline was phased out in Metro
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Thermal Conductivity of Metals and Non-metals 1. Introduction Thermal conductivity is a physical property of materials of great importance. Unlike some physical properties‚ however‚ thermal conductivity cannot be directly measured. In order to determine a material’s thermal conductivity‚ intermediate quantities must be determined from which the conductivity may be ultimately calculated. The objective of this lab was to determine the thermal conductivity of metals. To do so‚ it was necessary to study
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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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United Metals has decided to launch the production of a new product‚ the firm is expecting this project to last over 8 years. The issue at hand is to know whether it would be more advantageous for United Metals to produce the components itself or to directly buy them from one of its suppliers‚ Amalgamated Components. In order to arbitrage between the “make” and “buy” decision we will calculate the Net Present Value of both these options. In order to do so we will first compute the annual cash flows
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the more I realized I had always seen the world through the eyes of a character. Books have always been an outlet for me. When I was younger‚ I would purposely try to live out the lives of my favorite characters. The “Alice” book series by Phyllis Reynolds Naylor was a common inspiration to my habit. Whenever Alice wore a fuzzy pink turtle-neck with light wash jeans I was rummaging through my dresser finding something similar to wear.
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[pic] SHEET METAL STRUCTURES 2-1 D01 A well designed rivet joint will subject the rivets to A compressive loads. B tension loads. C shear loads. 2-1. Answer C. JSAT 2-51 (AC65-15A) Rivets hold pieces of aircraft skin together‚ and in a properly designed riveted joint‚ the rivets support shear loads only. 2-2 D01 A main difference between Lockbolt/ Huckbolt tension and shear fasteners (other than their application) is in the A method of installation
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group called the alkaline earth metals. Magnesium is found in seawater‚ salty layers and in many rock minerals. IT could be used as metal. It’s the third most abundant structural metal in the earth’s crust‚ only exceeded in aluminum and iron.Magnesium readily ignites upon heating in air and burns with a dazzling white flame. To extinguish the flame water should not be used. Alkaline earth metal salts in general‚ are less soluble in water than the corresponding alkali metal salts. Some are even so insoluble
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