Transition Metals 1a) The d-orbitals of a free transition metal atom or ion are degenerate (all have the same energy.) However‚ when transition metals form coordination complexes‚ the d-orbitals of the metal interact with the electron cloud of the ligands in such a manner that the d-orbitals become non-degenerate (not all having the same energy.) The way in which the orbitals are split into different energy levels is dependent on the geometry of the complex. Crystal field theory can be used to predict
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Leah Baker English Comp 1210 Critical Analysis September 28‚ 2011 Critical Analysis of an Ineffective Essay Author‚ Harriet Davids‚ of “The Extended School Day” believes all elementary schools should adopt an extended school day policy. Davids main ideas focus on the safety of the children‚ whether it be in the care of a nanny or home alone‚ safety is the number one priority. Davids not only states that an extended school day will be beneficial to the parents and the students‚ but also the
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Nicole Luck Dr. Paul Haspel American Literature I Ready Like a Red Jacket In Red Jacket’s speech he addresses Jacob Cram’s statement that “there is but one religion‚ and but one way to serve God‚ and if you do not embrace the right way‚ you cannot be happy hereafter”(). When Red Jacket responds‚ he is not only talking to his fellow tribe members‚ but to future generations as well. And not necessarily about religion‚ but about life and the flaws and effects an oppressive culture can have upon another
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A Critical Analysis: Living with Pets May Protect Infants from Allergies After parents give birth to a baby‚ they might start to think that they should let their dog and cat stay or throw away those domestic animals due to new born child may be allergic to them; Fortunately‚ Amanda Gardner has illustrated this fact in her article “Living with Pet May Protect Infants from Allergies‚” (Health.com‚ June 13‚2011.)‚ that children who live with dogs and cats before the first year of their life have
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Alkali Metals Introduction Alkali metals refer to six elements belonging to the Group IA of the long form of the Modern Periodic Table‚ viz. Lithium (Li)‚ Sodium (Na)‚ Potassium (K)‚ Rubidium (Rb)‚ Cesium (Cs) and Francium (Fr). Fr is a radioactive element. These elements are called so because they form strongly alkaline oxides and hydroxides. Electronic Configuration of Alkali Metals Each of the alkali metals has one electron in their outermost (valence) shell‚ which is just outside an inert
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EXTRACTION OF METALS SUMMARY Most metals exist in compounds in rocks in the Earth’s crust. Many of these ores contain oxides or sulphides of the metals. The compounds need to be reduced to produce the metals as elements. Metals are very useful to us because of their special properties. Reduction means removal of oxygen or gain of electrons. Carbon is a good chemical reducing agent because it readily combines with oxygen‚ but it is only useful for the metals below it in the Reactivity
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Resources‚ Conservation and Recycling 21 (1997) 145–173 Metals recycling: economic and environmental implications Robert U. Ayres * INSEAD‚ Boule6ard de Constance‚ F-77305‚ Fontainebleau‚ France Received 17 July 1997; accepted 27 July 1997 Abstract We are in a period of economic transition. The ‘cowboy economy’ of the past is obsolescent‚ if not obsolete. Environmental services are no longer free goods‚ and this fact is driving major changes. Recycling is the wave of the (immediate) future
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Critical Analysis Andrew Keen ‘s “Douse the Online Flamers” is an interesting essay based on- in my own words “online bullying”. In my own judgment the essay was convincing in terms that examples were giving as to mentioning different cases about “online bullying”. Keen presented evidence which had me engaged in the essay even more. Keen is proving a point and informing the reader about whether posting things online anonymously should be supported by the First Amendment or if there should be legal
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Metal fabrication is the building of metal structures by cutting‚ bending‚ and assembling processes: Cutting is done by sawing‚ shearing‚ or chiseling (all with manual and powered variants); torching with hand-held torches (such as oxy-fuel torches or plasma torches); and via numerical control (CNC) cutters (using a laser‚ mill bits‚ torch‚ or water jet). Bending is done by hammering (manual or powered) or via press brakes and similar tools. Modern metal fabricators utilize press brakes to either
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Corrosion of Metals Introduction Have you ever had a bike that went rusty‚ figure 1? If the paint is scratched and the rust allowed to spread‚ it is very difficult to repair the frame so it looks as good as new again. Rusting costs us millions of pounds each year‚ either through replacing things or through trying to prevent it happening in the first place. Figure 1: Bike rusting. In this booklet you learn about rusting and ways of stopping it‚ followed by a look at another metal‚ aluminium that
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