odour‚ bubbles‚ a new solid is seen (called precipitate)‚ change in temperature or light‚ not easily reversed Family: a column (groups) of elements with similar properties * four main groups: Alkali Metals‚ Alkali Earth Metals‚ Halogens and Noble Gases Period: rows on the periodic table Metal: an element that is lustrous‚ malleable‚ ductile and conducts heat and electricity;
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: Let’s now start by looking at the basic requirements for selecting materials that are suitable for a particular application. For example figure 1 shows a connecter joining electric cables. The plastic casing has been partly cut away to show the metal connector. Plastic is used for the outer casing because it is a good electrical insulator and prevents electric shock if a person touches it. It also prevents the conductors touching each other and causing a short circuit. As well as being a good insulator
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Introduction Aim: To investigate the factor affecting voltage of voltaic cell. Research Question: How does coupling of different metals from the electroactivity series affect the overall voltage of the galvanic cell? Background Information: The voltaic cell converts chemical energy to electrical energy to generate electricity. There are usually 2 electrolytes used containing spectator metal ions. A salt bridge is used to connect the 2 electrolytes in order to enable the transfer of ions. Circuit is connected
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main competition: American National Can‚ Continental Can‚ Reynolds Metal and Ball Corporation. Van Dorn Company and Heekin Can were regional threats. CCS and their main competitors comprised 61 % of the market in the metal can industry. There were approximately 100 other firms that served the rest of the market‚ but they were not plausible threats. Competition between the large firms was intense. Ball Corporation and Reynolds Metal were known for their technological advances. Ball Corp was also a
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Why do metals conduct electricity? Metals conduct electricity. The delocalised electrons are free to move throughout the structure in 3-dimensions. They can cross grain boundaries. Even though the pattern may be disrupted at the boundary‚ as long as atoms are touching each other‚ the metallic bond is still present. Liquid metals also conduct electricity‚ showing that although the metal atoms may be free to move‚ the delocalisation remains in force until the metal boils. Why are metals malleable
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Bishop’s University Department of Economics The “Day-of-the-Week” Effect: Analysis of Trends in the Daily Returns of Copper and Aluminum Lucas Zawislak and Jennifer Lee Dr. M. Vigneault Applied Economic Analysis March 15th‚ 2013 Introduction According to the neoclassical school of economics‚ asset markets are assumed to be both efficient and random. These two assumptions are the base from which two neoclassical theories are derived: 1) “The Efficient Market Theory” infers that
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the amount of resistance created in a wire. Another factor is the conductivity of the material we are using. Some metals are just more electrically conductive than others. As long as I use the same type of metal for each wire‚ my experiment will remain fair. Cross Sectional Area The thicker the wire‚ the less resistant it is. This is because there are more electrons in the metal that are free to move as a current. Also‚ there is more space for the electrons to flow‚ so more can fit down. This
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lithosphere. It is separated from the ore found in the lithosphere. Gold’s symbol is Au. Its atomic number is 79 and has an atomic mass of 196.96655 amu. Its melting point is 1064.43°C‚ while its boiling point is 2807.0 °C. It is a transition metal and is yellow or gold in colour. There are also many principles used in the separation of gold. One of these is boiling points in the process of smelting. In Froth floatation‚ the principle is the organic chemicals in the gold which causes it to
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The Reaction of Various Metals with Ionic Salts Purpose: To examine the reaction of various metals with ionic salts Materials: * 4 test tubes * test tube racks * 10mL measuring cylinder * 4 metals (in containers)- Zn‚ Sn‚ Mg‚ Fe * copper (II) sulphate solution Safety: 1. Be careful with copper (II) sulphate solution it is poisonous and corrosive. handle with care 2. Do NOT BREATH in any gases produced 3. If you touch any of the metals‚ you MUST wash your hands
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VOLUME‚ AND DENSITY Purpose: The purpose of this experiment is find the density of two metals using their mass and volume. Introduction: The purpose of the experiment that was conducted was to measure and calculate the density of two different metals. Density is an important characteristic of a material. The density of an object shows how much mass is contained in the unit volume. To calculate the density of metals the experimenters had to find out the mass and volume of each and then use the following
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