The element of Nickel is number 28 which means it has 28 electrons and 28 protons (this is the atomic number). The atomic mass of Nickel is 58.71 g.mol^-1 which means that there are 30.69334 neutrons since you subtract the number of protons from the atomic mass to get the number of neutrons. The electronegativity of Nickel is 1.8 on the Pauling scale; this is the tendency of Nickel to attract a bonding pair of electrons. The density of Nickel is 8.9 g.com^-3 at 20°C and the melting point is 1454
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global witness global witness China and Congo : Friends in Need A report by Global Witness on the Democratic Republic of Congo‚ March 2011 Global Witness investigates and campaigns to prevent natural resource-related conflict and corruption and associated environmental and human rights abuses. Our investigations and lobbying have played a key role in the establishment of the major international initiatives addressing these issues‚ including the Kimberley Process and the Extractive Industries
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Diamond Coated Machine Tooling An Empirical Research Report Timothy J. Johnson April 12th‚ 2007 ME595 – Manufacturing Tribology Oakland University Introduction Diamond is the hardest material known to man‚ in this day and age. Typically‚ diamonds have been known to demonstrate hardness values up to 12000 HV (Vickers Hardness) or approximately 100HRC. Diamond-coated Tungsten Carbide tools have demonstrated improved machining characteristics over coated tool steels commonly used today
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Selective precipitation of the Barium Magnesium Group Chem 112-004 Abstract The purpose of this experiment is to separate and identify the cations of Ba+‚Sr2+‚Ca2+‚ Mg2+ and NH4+ using differences in solubility and confirming test to identify the unknown solution used in this experiment. In this experiment the methodology used by the group is to perform the tests for both the unknown and the cations (Ba+‚Sr2+‚Ca2+‚ Mg2+ and NH4+) using the known as a control for comparison and identification
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Discussion Questions 1. Why do different metals have different characteristic flame test colours? The photons emitted during the test precisely match the quantum energy difference between the excited state and the ground state. For different elements the spacing between the ground state and the higher energy levels is different. So different elements have different flame test colours. 2. Most salts contain a metal and a non-metal. Look at the compounds we tested and determine whether it is
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Title Experiment 17 Reaction Kinetics- Determination of the Activation Energy of the Reaction Between Oxalic Acid and Potassium Permanganate. Objective To determine the activation energy of the reaction between oxalic acid and potassium permanganate. Theory and Background Activation energy is the minimum amount of energy that is required to activate atoms or molecules to a condition in which they can undergo chemical transformation or physical transport. In terms of the transition-state
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the N-bonded ligand‚ the corresponding vibration wave number are 1310 and 1430 cm-1. Structures of the two linkage isomers of [Co(NH3)5(NO2)]2+. Procedure Preparation for isomer [Co(NH3)5(NO2-N)]Cl2 (yellow or orange-brown) * 1.5g of Cobalt(III)penta-amine‚ chloride was dissolved into a 15mL of water with ammonia (5mL) on a 100mL beaker. * The complex solution was boiled completely‚ filtered‚ cooled and acidify with diluted HCl‚ (orange litmus paper was used). * NaNO2 (2g)
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Recent Breakthrough - “Artificial Leaf” In the past 3 million years‚ the levels of atmospheric carbon dioxide have been at their highest ever. With the more relatively recent beginning of the Industrial Age‚ the amount of clean‚ breathable air that humanity depends upon for survival‚ has‚ as a response to the Era‚ decreased. The increase in carbon emissions and the increasing dependence upon fossil-fuels for energy has led to a global race for the creation of a carbon-neutral‚ renewable energy
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GM Ignition Case Ethical Evaluation Joe Pirozzoli General Studies Milwaukee School of Engineering Author Note Joe Pirozzoli‚ General Studies‚ Milwaukee School of Engineering Prepared for HU 432 Ethics‚ Professor Paul Hudec and submitted 4/9/2015. Correspondence regarding this article should be directed to: E-mail: pirozzolij@msoe.edu Abstract The contents of this paper will analyze the GM ignition case using several concepts taught in ethics. This will include a background of the issue
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w w ap eP m e tr .X w om .c s er UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education 0620/12 CHEMISTRY Paper 1 Multiple Choice May/June 2010 45 Minutes Additional Materials: *8778752636* Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction
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