Chemical bond From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. The bond is caused by the electrostatic force of attraction between opposite charges‚ either between electrons and nuclei‚ or as the result of a dipole attraction. The strength of chemical bonds varies considerably; there are "strong bonds" such as covalent or ionic bonds and "weak bonds"
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Chemical Periodicity ------------------------------------------------- ABSTRACT The experiment chemical periodicity shows the properties and reactions belonging to group IA‚ IIA‚ and IVA. Proper procedures and observations were done to determine the solubility‚ physical state‚ color‚ and appearance of the compounds namely Li2CO3‚ Na2CO3‚ K2CO3‚ CaCO3‚ and BaCO3. The results shows that Li2CO3‚ Na2CO3‚ K2CO3 were soluble in water‚ while MgCO3‚ CaCO3‚and BaCO3 were not soluble. All of these compounds
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Jennifer Obrien Date: 11/ April 11‚ 2013 Abstract Inexpensive‚ affordable food is a person’s wants. If find some ways to solve this problem‚ keep food quality and price. So‚ in this paper discuss the solution of how to strike a balance between inexpensive‚ affordable food and healthy‚ quality food. Firstly‚ according to international trade‚ people can import some healthy food from other country‚ which place has lower labor. So‚ people can control the
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Case Study: British Telecom: Searching for a winning strategy Tuomo Summanen Michael Pollitt Judge Institute of Management November 2002 1. Introduction The development of the telecommunications market in the United Kingdom and the corporate strategy and development of the incumbent‚ British Telecom‚ represents an interesting object of analysis for several reasons. First‚ the UK telecommunications market was - along with the U.S. market - among the first telecommunications market that
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Hurry Date‚ a small & privately owned company‚ is one of the America’s leading provider of speed dating with a strong brand recognition. It’s an online version of traditional round-robin speed dating. It operates a website HurryDate.com to screen singles looking to mingle. The range of service it provides are‚ online match-making‚ personal browsing and event hosting. It does this by hosting round-robin meeting event for potentials dating candidates. This is where they make money by charging
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MapReduce is a widely used parallel computing framework for large scale data processing. The two major performance metrics in MapReduce are job execution time and cluster throughput. They can be seriously impacted by straggler machines— machines on which tasks take an unusually long time to finish. Speculative execution is a common approach for dealing with the straggler problem by simply backing up those slow running tasks on alternative machines. Multiple speculative execution strategies have been
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Airbnb offers free rentals to the victims of hurricane Matthew The government ordered millions of residents in the southeastern U.S to vacate their places due to the dangerous hurricane have approached the city. The home sharing platform‚ Airbnb has decided to help the people whose houses were affected by the dangerous storm. Hurricane Matthew moved to Florida’ east cost before affecting the regions of Georgia and South California. Though the storm has weekend‚ the impacts it created takes days to
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changes are used to describe matter. A property is a trait of matter‚ when that sample of matter is in a fixed state. There are two different types of properties: physical properties and chemical properties. A change is something that alters the properties of a substance. There are two types of changes: chemical changes and physical changes. A physical property is a property that can be observed without changing the makeup (or composition) of a substance. Some examples of a physical properties
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Appendix B: Methodology GridIndicated Ratings Appendix C: Observations and Outliers for Grid Mapping Appendix D: Chemical Industry Overview Appendix E: Key Rating Issues over the Intermediate Term 1 3 5 8 Corporate Finance December 2009 Moody’s Global Global Chemical Industry Summary This rating methodology explains Moody’s approach to assessing credit risk for global chemical companies. This document replaces a previous publication from February 2006. The grid for the rating methodology
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Drugs and Chemicals to be Avoided in G6PD Deficiency Drugs to be Avoided in G6PD Deficiency There are different types of G6PD deficiency‚ an individual need to know the type of G6PD that they have inherited because each types of G6PD deficiency react to drugs differently and some may not react to some of the drugs and chemicals listed here. This is not a comprehensive list there are drugs and chemicals that may also be harmful to those with G6PD deficiency that are not on this list an individual
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