Lewis Dot Structure Example - Octet Rule Exception

Lewis Dot Structure Example - Octet Rule Exception Lewis dot structures are useful to predict the geometry of a molecule. Sometimes, one of the atoms in the molecule does not follow the octet rule for arranging electron pairs around an atom. This example uses the steps outlined in How to Draw A Lewis Structure to draw a Lewis structure of a molecule where one atom is an exception to the octet rule. Review of Electron Counting The total number of electrons shown in a Lewis structure is the sum of the valence electrons of each atom. Remember: non-valence electrons are not shown. Once the number of valence electrons has been determined, here is the list of steps normally followed to place the dots around the atoms: Connect the atoms by single chemical bonds.The number of electrons to be placed is t-2n, where t is the total number of electrons and n is the number of single bonds. Place these electrons as lone pairs, starting with outer electrons (besides hydrogen) until every outer electrons has 8 electrons. Place lone pairs on most electronegative atoms first.After lone pairs are placed, central atoms may lack an octet. These atoms form a double bond. Move a lone pair to form the second bond.Question:Draw the Lewis structure of the molecule with molecular formula ICl3.Solution:Step 1: Find the total number of valence electrons.Iodine has 7 valence electronsChlorine has 7 valence electronsTotal valence electrons 1 iodine (7) 3 chlorine (3 x 7)Total valence electrons 7 21Total valence electrons 28Step 2: Find the number of electrons needed to make the atoms happyIodine needs 8 valence electronsChlorine needs 8 valence electronsTotal valence electrons to be happy 1 iodine (8) 3 chlorine (3 x 8)Total valence electrons to be happy 8 24Total valence electrons to be happy 32Step 3: Determine the number of bonds in the molecule.number of bonds (Step 2 - Step 1)/2number of bonds (32 - 28)/2number of bonds 4/2number of bonds 2This is how to identify an exception to the octet rule. There are not enough bonds for the number of atoms in molecule. ICl3 should have three bonds to bond the four atoms together. Step 4: Choose a central atom.Halogens are often the outer atoms of a molecule. In this case, all the atoms are halogens. Iodine is the least electronegative of the the two elements. Use iodine as the center atom.Step 5: Draw a skeletal structure.Since we do not have enough bonds to connect all four atoms together, connect the central atom to the other three with three single bonds.Step 6: Place electrons around outside atoms.Complete the octets around the chlorine atoms. Each chlorine should get six electrons to complete their octets.Step 7: Place remaining electrons around the central atom.Place the remaining four electrons around the iodine atom to complete the structure. The completed structure appears at the beginning of the example. Limitations of Lewis Structures Lewis structures first came into use early in the twentieth century when chemical bonding was poorly understood. Electron dot diagrams help illustrate electronic structure of molecules and chemical reactivity. Their use remains popular with chemistry educators introducing the valence-bond model of chemical bonds and they are often used in organic chemistry, where the valence-bond model is largely appropriate. However, in the fields of inorganic chemistry and organometallic chemistry, delocalized molecular orbitals are common and Lewis structures dont accurately predict behavior. While its possible to draw a Lewis structure for a molecule known empirically to contain unpaired electrons, use of such structures leads to errors in estimating bond length, magnetic properties, and aromaticity. Examples of these molecules include molecular oxygen (O2), nitric oxide (NO), and chlorine dioxide (ClO2). While Lewis structures have some value, the reader is advised valence bond theory and molecular orbital theory do a better job describing the behavior of valence shell electrons. Sources Lever, A. B. P. (1972). Lewis Structures and the Octet Rule. An automatic procedure for writing canonical forms. J. Chem. Educ. 49 (12): 819.  doi:10.1021/ed049p819Lewis, G. N. (1916). The Atom and the Molecule. J. Am. Chem. Soc. 38 (4): 762–85. doi:10.1021/ja02261a002Miessler, G.L.; Tarr, D.A. (2003). Inorganic Chemistry (2nd ed.). Pearson Prentice–Hall. ISBN 0-13-035471-6.Zumdahl, S. (2005). Chemical Principles. Houghton-Mifflin. ISBN 0-618-37206-7.

Black Power Essay Example | Topics and Well Written Essays - 1250 words

Black Power - Essay Example This declaration by Stokely Carmichael was sparked by the massive differences that existed between the black community and the white community of America. In the opinion of the Black Power Movement followers, the white community was so much dominant in the political, economic and social fields among other fields. This had been achieved by the whites by craftily putting in place structures that would ensure that whites were always superior while blacks were the subjects. In their book Black Power: The Politics of Liberation in America, Carmichael and Hamilton are categorical by stating; We cannot see how the black people, who are massively insecure both politically and economically, can coalesce with those whose position is secure - particularly when the latter's security is based on the perpetuation of the existing political and economic structure (75). This paper will underscore the truth of the statement in light with the prevailing political and economic conditions of the time of the statement. That will be achieved by highlighting the political differences of the time, followed by the economic differences and finally integrating them to show the massive gaps between the two races, and at the same time, to show that the white race was by far and unfairly dominant over the black community. Political Differences. ... From this point of view, it becomes evident that the whites had all the policies and framework allowing only whites to have the giant share of political dominance. Furthermore, the blacks had no representation that would ensure that their political views and opinions were taken into consideration. This is evident from the opinion of Carmichael and Hamilton that the young black male had no channel for expressing their political views and frustrations. As a result of this lack of representation, the government did not have the interests of the black community in its agenda. From the perspective of the blacks, there was no government ear for a black person. It was only set up to listen to the white population and fully represent the interests of the whites at the expense of the blacks. For that reason, there was no adequate political representation that would ensure that young black males got a forum for exchanging political views, and at the same time have leadership role models. The o nly types of models that existed were radicals and leaders of movements who were political activists. In such a position, no black politician had the opportunity to make any political difference from the status quo set by the whites. The status quo, in itself, was one of the key bothers to the black community. It allowed political dominance and decision making to fall on the white community only. The whites were pleased with the status quo since it gave them an upper hand as compared to the minor blacks (Carmichael and Hamilton). The whites were willing to work with the status quo regardless of whether it was oppressive to the black community or not. This status quo was achieved regardless of the fake democratic practice of voting. The

Should Americans have free universal health care Research Paper

Should Americans have free universal health care - Research Paper Example However, the health insurance project does not give an impression of achieving its intended purpose of providing quality health security. In the contemporary American society, health security seems to be confined to a given section of the local populace. I am a loyal retiree and an inhabitant of the United States of America. No member of my entire family is currently entitled to health insurance coverage. My health insurance coverage was, unfortunately, withdrawn when I lost my job. Nonetheless, I do admit that even when I enjoyed the privileges that come with full-time job, I never benefited from the scheme as to my expectations. Consequently, my quest for valuable health care services coerced me into conducting a research on the proposed free Universal Health Care; its legitimacy and suitability to the ordinary American population. The research paper is a detailed, analytical editorial based on a number of past research studies. INTRODUCTION The universal health care, also known as the social health protection, is a system which provides quality health coverage and financial shield to all citizens of a given country. Its key goal is to provide a significant package of financial and medical promotions to all members of the state’s populace. ... Today, scores of debates and arguments have developed in America pertaining to whether or not the Universal health coverage is morally justified. The so called Obama Care was established and approved in 2010 as an idea of the Institute of Medicine. Its principal concern is to ensure that all Americans have affordable health coverage by 2014. The Americans’ take on the current health care system Most American citizens sympathize with the fact that the present-day American healthcare system is skewed toward the concern of corporate bodies rather than independent individuals and small scale business units. The contemporary American health insurance policy employs a scheme known as pooling in which employers attached to large corporations insure their employees with health care insurances, subject to contract. However, there is usually a wide disparity between the sick and healthy as a majority of the insured employees live healthily. As a matter of facts, the said discrepancy cov ers the expenses of the sick resulting to sound premiums for the companies’ employees. Conversely, this approach is only appropriate for companies with the substantial number of employees thus creating hurdles for undersized businesses. Miniature business units find sheer intricacy in covering their employees. This is attributed to the high ratio of the hill to the healthy resulting in sky-scraping premiums. In contrast, such establishments often fail to afford the premiums hence opt out of upholding the health coverage system for their employees. As a result, most American employees in the small business sector tend to believe that the proposed free Universal health coverage will be a better deal if well implemented.

Fanon on Africa Essay Example | Topics and Well Written Essays - 1250 words

Fanon on Africa - Essay Example This national consciousness is perceived as the key to true liberation although some were not convinced because of its actual pitfalls like what happened in Africa. In other words, the formation of liberation movements is not seen as an effective remedy to battle the aftermaths of the colonization period. Post-colonialism writers have significantly explained and offered various ideas regarding the proper ways of gaining back national identity while preventing the continuous unnoticeable acts of colonization. In relation, the book entitled The Wretched of the Earth by Frantz Fanon clearly elaborated these methods (Magaisa). A chapter regarding â€Å"The Pitfalls of National Consciousness† mainly tackled on the aftermaths of the colonial period during which liberation movements for national identity were rampant. Comprehensively, the book presented theories why the African anti-colonial liberation movements emerged after their independence. Frantz Fanon declared that these parties have contributed to the degeneration and destruction of their identity politics rather than gaining back their true independence. The author introduced the chapter with a statement pointing out the relation between colonialism and nationalism. He said that â€Å"the battle against colonialism does not run straight away along the lines of nationalism† (Fanon 148). Fanon further stressed that the â€Å"social and intellectual incapability of the educated class, the absence of unified mass effort, the unprecedented laxity and timidity at the crucial struggling stage of liberation will result to disastrous misfortune† (148) . Likewise, he defined national consciousness as the â€Å"all-embracing crystallization of the innermost hopes of the whole people and the immediate and most obvious result of mobilization† (Fanon 148). In articulating the effects of colonization to the society, Fanon contended that some interest groups are harmful and

Comparing Owen and Women Writers Poems

Comparing Owen and Women Writers Poems Owen was an English poet whose work was characterised by his anger at the cruelty and waste of war, which he experienced during service on the Western Front. Edited by Sassoon and published in 1920, Owens single volume of poems contain some of the most poignant English poetry of World War One, including Dulce et Decorum Est and Anthem for Doomed Youth. One way Owen conveys the experience of war is by making people aware that the actual horrors of war were hidden behind propaganda. He conveys this very well in Dulce et Decorum Est My friend, you would not tell with such high zest To children ardent for some desperate glory, The old Lie: Dulce et decorum est Pro patria mori. This is one of the most memorable lines of Owens poetry. It translates from Latin to: It is sweet and right to die for ones country. This was a phrase repeated in schools and churches and homes and political circles to entice young men to embrace patriotic fervour and enlist in the military. The true nature of war was concealed and they went off to war like the soldier in Disabled young, naive, full of dreams and completely unprepared for the carnage and complexity, half his lifetime lapsed in the hot race. This completely dismantles the myth that war is glorious and young men should die on their nations behalf. The verses before the last lines of Dulce et decor um est implies that the war was a surreal war of horror, nightmare, and pain. This single poem of Owens is enough to convey to the reader just how terrible WWI was, and how far removed the actuality of battle was from idealism and heroism. The Falling Leaves Margaret Cole says I saw the brown leaves dropping from their tree by connecting the leaves to the soldiers she is linking the inevitability of the soldiers deaths to the inevitability of the leaves falling from the tree. This shows that, like Owen, Margaret believes that the propaganda is misleading and although she thinks the soldiers are brave gallant multitude she thinks they are being brave for the wrong reasons, just like Owen. Owen, again, reveals the lies of propaganda in Disabled Some cheered him home, but not as crowds cheer Goal Owen is implying that no one appreciates the protagonist and his work, Owen implies that he is forgotten and that he is not the hero he thought he would be and the propaganda misled him comple tely. Another way Owen conveys the experience of war is by highlighting how the soldiers are not appreciated as there are loads of soldiers and an individual is not going to be remembered for what a vast mass has done even if that individual has lost a part of him for the war. One of the reasons why Disabled is such a strong and memorable poem is how much it resonates with the reader. The young protagonist is realistic, relatable. He could be any one of the young men who joined the war for glory and did not stop to contemplate the sacrifices required, and who returned home very different physically or psychologically from his former self. He spends much of the poem reminiscing about the days before the war when he was heroic and beloved, as well as physically whole. He joined the war for seemingly silly reasons, and Owen condemns how easy it was for such a naive boy to lie about his age and enlist. Now he will never feel again how slim Girls waists are, or how warm their subtle hands, All of them touch him like some queer disease. The quote shows how the boys greatest regret now is that he will not be attractive to women. He does not lament his lack of glory or awards, but that his life back at home will be incomplete and unfulfilling. This is a pitifully sad and universal fear for young men of all wars and all eras. The protagonist doesnt think he is a whole person men that were whole he is abandoned, uncared for, isolated, forgotten as he is not really a man. Margaret Cole similarly writes about this issue in The Falling Leaves I saw the brown leaves dropping from their tree this implies that the soldiers deaths are trivial, just like Owen did, as she is implying that in this poem the leaves are soldiers and not many people care if a multitude of leaves fall off a tree they just carry on with their lives as if nothing happened. Margaret Cole is implying that the after effects of the soldiers are trivial to society. Anna Gordon-Keown differs in the way she conveys t he experience of war. In Reported Missing Anna writes about a mother who has recently received news that her son has been reported missing while he was fighting in the war. Anna conveys the mother to be grieving heavily, and also in denial of the sons death, This heart would never beat if you were dead.. The fact that the mother is in so much distress really implies that the death of one soldier can mean the emotional death of many. Owen also highlights how the soldiers are being controlled in Anthem for Doomed Youth What passing-bells for those who die as cattle?ÂÂ   Only the monstrous anger of the guns.. This poem suggests that the young men fighting in the war die nameless and faceless like animals. They are denied the dignity of proper funerals and burials in many cases, and are not afforded the rituals and traditions of those who die under normal circumstances. They must be content with the sounds of guns and rifles as their bells and choirs. Owen also expresses sympathy with the women back at home who mourn their fallen sons, husbands, and brothers, but has little to comfort them. War disrupts the patterns and norms of life, and, clearly, of death. Owen also highlights how soldiers are being controlled in Dulce et Decorum Est where Owen says Men marched asleep this implies that the soldiers are simply going to war for the sake of it and are being blinded by their false hope of being a hero not ration ally thinking of the consequences to soon follow. In conclusion, Owen is (rightfully) very infuriated with practically everything to do with war and he didnt like how it was portrayed. He has first-hand experience with the horrors of war but the women writers dont so they can only write about what they have heard (or have been fed) so the ways they convey war are sometimes quite different.

Narrative Frames and Ambiguity in Henry James The Turn of The Screw Es

Narrative "frames" and Ambiguity in The Turn of The Screw   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Since it was written, Henry James' The Turn of The Screw has been acclaimed by numerous critics to be one of the most immaculate, engrossing and terrifying ghost stories ever produced. Harriet Waters Preston described it as, "a sheer mortal horror, like the evil dream of a man under the spell of a deadly drug"1, and Gertrude Atherton said, "[it] is the most horrifying ghost story ever written!"2 I will argue that it is the narrative frames enclosing The Turn of The Screw that are largely responsible for the reception the book has received. They serve two main purposes; one, to build up an element of suspense and tension before the governess's account actually begins, thus heightening the potential for horror and terror in the text; and two, to cast uncertainty on the reliability of the narrators and hence to increase the ambiguity and scope for interpretation of the text. In fact, I will argue that these frames do not assist the reader in interpreting the action, but are actually used by James to deliberately confound the reader and foster an ambiguous atmosphere. At first glance there appear to be three narrative frames surrounding the governess' account. At the outermost level we have the voice of the narrator. The narrator tells us of a time when they were one of several guests staying at the abode of a character named "Griffin". Whilst there, the narrator heard the governess's tale, as told by Douglas over a period of several nights. Although the narrator was not at Bly, nor did they take any part in the tale of the governess, it is the narrator's retelling of this story that the reader receives. Within this is the reading by Douglas, who ... ...: Macmillan, 1968). Troy, William, "The Altar of Henry James" in Tanner, Tony, ed., Henry James Modern Judgements (London: Macmillan, 1968). Endnotes 1 Gard, Roger, ed., Henry James The Critical Heritage (London: Routledge & Kegan Paul, 1968), pp. 333. 2 Ibid, pp. 361. 3 Sheppard, E. A., Henry James and The Turn of the Screw (Suffolk: Oxford University Press, 1974), pp. 17. 4 James, Henry, "The Turn of the Screw" in Hampl, Patricia, ed., The Houghton Mifflin Anthology of Short Fiction (Boston: Hougton Mifflin Company, 1989), pp. 617. 5 Ibid, pp 617. 6 Ibid, pp. 617. 7 Ibid, pp. 620. 8 Gard, pp. 275. 9 Hosking, Rick, lecture for English 1A: ENGL 1003, Flinders University, 12th March 1996. 10 Tanner, Tony, ed., Henry James Modern Judgements (London: Macmillan, 1968), pp. 33. 11 Sheppard, pp. 15. 12 Ibid, pp. 15.

J.Co Donuts and Coffee Distribution Case Study

After 5 years of continued operation, CO enters the Philippine market and opened Its first branch In SMS Magical. The said company Is owned and managed by Johnny Andrea Group. IV. Statement of the Problem The main problem of J. CO Donuts and Coffee is the consistent long line when ordering prevents the customers from buying. It makes the customers passed off because they are wasting their time and effort falling in a long line. This problem can cause people's dissatisfaction about the product as well as to the store.If not solved s soon as possible, people, as well as the loyal customers, may get tired of the products offered by the company. V. Area of Consideration O. Co Donuts & coffee SOOT Analysis) Strengths J. CO Donuts and Coffee are very famous because of their deferent varieties of delicious doughnuts; J. CO prides itself for creating a life cafe © concept that is vibrant and energetic; stylish yet Interactive and customer-friendly; Also for using only premium ingredients i n its signature range of coffee and chocolate beverages and donuts which appeal to even the most discerning customers.Weaknesses You have to fall in a long line if you want to buy their products; Lack of promotion and activity to develop more loyalty customers; J. CO's Beverages are not preferable because Its size Is smaller compared to other competitors. J. CO Doughnuts are healthier compared to other donuts offered by the competitors. J. CO Doughnuts are more preferable because of its balanced sweetness. When it comes to prices, J. CO Donuts and Coffee has lower prices compared to Crispy Creme.Threats People may get tired of the products if the problems are not solved as soon as Seibel; Loyalty of the customers to the store will start to deteriorate if they're not receiving any fast service, as said people can get tired. VI. Alternative Courses of Action Implement online ordering; online delivery and put up Drive Thrush; As a customer it will be fast and easy for me to buy the pro duct. Implement an order form; It is such a hassle to a customer to make Just â€Å"tour-tour† on what they are going to buy. Continue to build expansions.More branches, more satisfied customers, as well as it can contribute to the advertising of the store. VI'. Recommendation and Conclusion The best solution to the long line in the store is to implement online ordering. With the technology nowadays, it will be more of convenience to the customer if they could just click their order and the boom! There goes their order. It will be fast and easy. Eating those cute doughnuts will not be that time consuming. Therefore, it will make the customers happy. Also, it will keep the loyal customer to be satisfied with the product as well as to the service.