The Element: Chlorine General Information We researched the chemical element known as chlorine. Chlorine has an atomic number of 17 and an atomic weight of 35.453. It has a valence number of 3. The element has 3 energy levels. Chlorine exists as a greenish-yellow gas at normal temperatures and pressures. Chlorine is second in reactivity only to fluorine among the halogen elements. Chlorine is a nonmetal. It is estimated that 0.045% of the earth’s crust and 1.9% of sea water are chlorine.
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A diode is a two-terminal device‚ having two active electrodes‚ between which it allows the transfer of current in one direction only. Diodes are known for their unidirectional current property‚ wherein‚ the electric current is allowed to flow in one direction. Basically‚ diodes are used for the purpose of rectifying waveforms‚ and can be used within power supplies or within radio detectors. They can also be used in circuits where ’one way’ effect of diode is required. Most diodes are made from semiconductors
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EXPERIMENTAL DETAILS All chemicals used were Merck reagent grade. Solutions were formulated with chromium sulfate (Cr¬2(SO4)3.6H2O) as chromium source in the quantities presented in (Table 1); Solutions were heated to 60°C for three hours during complexation reaction as in [29]‚ and pH was adjusted to 3 units without HCl or NH3 . Table1- electrolyte and electrodeposition parameter The coatings were deposited on a 1 x 1.5 cm2 cooper plate sample. Preparation for all specimens was as follow: Firstly
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to energy. A positron and a negatron are produced; the positron is annihilated when it collides with an electron. Electrons are boiled off from the cathode of an x-ray tube. They are accelerated to high speed by a potential difference to strike the anode also known as the target. The incident electron interacts with an inner shell electron of the target material this creates a vacancy in the shell. An electron from an outer shell fills that space and releases energy in the form of an x-ray of characteristic
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Copper is an element that occurs in minor amounts in the earth’s crust. Estimates of average crustal prevalence are on the order of 0.0058 percent by weight. Deposits considered to be economically recoverable at current market prices may contain as little as 0.5 percent of copper or less‚ depending on the mining method‚ total reserves‚ and the geologic setting of the deposit. Here is the flow sheet on how to process copper from Zenith. Copper Process Flow Sheet: Copper ore is first quarried from
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1. INTRODUCTION The next Pearl Harbor will not announce itself with a searing flash of nuclear light.You will hear a sharp crack in the distance. By the time you mistakenly identify this sound as an innocent clap of thunder‚ Fluorescent lights and television sets will glow eerily bright‚ despite being turned off.. Your Palm Pilot and MP3 player will feel warm to the touch‚ their batteries overloaded. Your computer‚ and every bit of data on
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The Potential of Malunggay (MORINGA OLEIFERA) Leaf Extract as an Alternative Source of Electricity A Research Proposal By Raymundo Jonieve B. Lanoy Submitted to the Faculty of the Tagbilaran City Science High School In partial fulfillment of the requirements for Research IC January 2014 CHAPTER 1 THE PROBLEM: RATIONALE AND BACKGROUND Electrical phenomena have been studied since antiquity‚ though progress in theoretical understanding remained slow until the seventeenth and
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 0620/01 October/November 2008 45 Minutes *6400528663* READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the
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Taken from http://www.popularmechanics.com/science/research/1766936.html [Accessed on December 18‚ 2008] 5 New Ideas To Power Our Future - October 2005 Cover Story from Popular Mechanics With the outlook for oil uncertain‚ it’s time for new ideas. Here are five emerging technologies--from buoys that harness the power of waves to bacteria that extract electricity from wastewater. Together they can keep the world humming. BY KRISTIN ROTH Illustrations by Flying-Chilli.com Published in the October
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Rust is an iron oxide‚ usually red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture. Several forms of rust are distinguishable both visually and by spectroscopy‚ and form under different circumstances.Rust consists of hydrated iron(III) oxides Fe2O3·nH2O and iron(III) oxide-hydroxide (FeO(OH)‚ Fe(OH)3). Given sufficient time‚ oxygen‚ and water‚ any iron mass will eventually convert entirely to rust and disintegrate. Surface rust is flaky and friable‚
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