Bonds Definition and Examples in Chemistry

Bonds Definition and Examples in Chemistry In chemistry, a bond or chemical bond is a link between atoms in molecules  or compounds and between ions and molecules in crystals. A bond represents a lasting attraction between different atoms, molecules or ions. Why Bonds Form Most of bonding behavior can be explained by the attraction between two opposite electrical charge. The electrons of an atom or ion are attracted to their own positively-charged nucleus (containing protons), yet also to the nuclei of nearby atoms. Species that participate in chemical bonds are more stable when the bond is formed, typically because they had an imbalance of charge (greater or fewer number of electrons than protons) or because their valence electrons did not fill or half-fill electron orbitals. Examples of Chemical Bonds The two main types of bonds are  covalent bonds  and  ionic bonds. Covalent bonding is where atoms share electrons more or less equally between each other. In an ionic bond, an electron from one atom spends more time associated with the nucleus and electron orbitals of the other atom (essentially donated). However, pure covalent and ionic bonding is relatively rare. Usually a bond is intermediate between ionic and covalent. In a polar covalent bond, electrons are shared, but the electrons participating in the bond are more attracted to one atom than to the other. Another type of bonding is a metallic bond. In a metallic bond, electrons are donated to an electron sea between a group of atoms. Metallic bonding is very strong, but the fluid nature of the electrons allows for a high degree of electrical and thermal conductivity.

Analysis Essay Example | Topics and Well Written Essays - 1000 words - 5

Analysis - Essay Example The first part dwells on the first idea. It lasts from 0:00 to 2:59. The end of this part is obvious due to harmonic minor applied in the last idea in the piece to make a smooth transition to the second section. The second part starts at 2:59 and ends at 4:44. It is simpler in its melody because it repeats the second idea two times before the third section, which develops the first idea further (4:45-6:18). This part is interesting due to the fact that there is a special variation for cello in it and unusual transition between 2 variations of the first idea represented in this part. The last section dwells on variations of the second idea. They become minor and major, but the melody remains recognizable. This part is united with the previews one by â€Å"rhetoric† call and response linkage. It starts at 6:19 and ends at 7:53. The first section has violins in their leading part. They are followed by viola. Cello performs the role of bass in this section. The second section, on the contrary, is led by the viola and cello. Violin comes in the second variation of the idea together with pizzicato accompaniment of the viola. In the thirst section, violin and cello have major parts. After it cello has its solo. It is interrupted by viola and violins to lead the section to the end. The last section starts with cello. Violins and viola continue the melody further. This part is very airy; it is almost deprived of the bass party. Pizzicato cello appears in the second part of this section on the background to follow the violins and viola. It is notable that first two sections have the same tempo. They are both played in moderato which link them together. The first part is dynamic because of little expressive deviations in tempo close to the culmination. Melody is most tensed in the places where strings take the lead. Loud in the beginning, the melody fades out close to the end in the first section; it represents the models of

Quantitative Analysis of Business Coursework Example | Topics and Well Written Essays - 2000 words

Quantitative Analysis of Business - Coursework Example Determine the equations for each of the three constraints that are plotted on the attached â€Å"graph 1†, showing all work necessary to arrive at the equations.  Determine the equations for each of the three constraints that are plotted on the attached â€Å"graph 1†, showing all work necessary to arrive at the equations.  Identify each constraint as a minimum or maximum constraint.   The objective function is Z= 30X+72Y+90Subject to   7.5X + 7.5Y ≠¤ 30 (equation for Nutrient C)    6X + 12Y       ≠¤ 72 15X + 6Y ≠¤ 90          X ≠¥ 0, Y ≠¥ 0 Since the feasible region is below the constraints the constraints are minimum constraints. Determine the total contribution to profit, if the company produces a combination of cases of brand X and brand Y that lies on the purple objective function (profit line) as it is plotted on the attached â€Å"graph 1†.If the company chooses to produce a combination of brand X and Y as given in graph then the different combinations would be (0, 8), (1, 6.6), (2, 5.4), (3, 4), (4, 2.6), (5, 1.3), (6, 0). The contribution to profit at various combinations can be obtained using the objective function where profit= 30X+72Y+90 and substituting the value of X and Y for each set in this function we get profit for each combination.When the company produces 8 units of Brand Y and no Brand X the profit function is maximized (666). But this combination is outside the feasible region. So, the combination that gives maximum profit (468) to the producer within the optimal region is 3 units of X and 4 units of Y. The Total Contribution of Profit: The total contribution to profit which can be obtained by producing 3 units of brand X and 4 units of brand Y is 468 which is obtained by putting the values of X and Y in the profit

Way in Which Piaget and Vygotsky Share Similar Ideas Essay Example for Free

Way in Which Piaget and Vygotsky Share Similar Ideas Essay While both Piaget and Vygotsky were similar in their views in certain ways. Most commonly shared were their views as constructivists (the idea of learning by doing) and believed that social forces set the limits of development. The most obvious difference is their view of cognitive development. Where Piaget felt that cognition develops in four discreet stages that are limited, Vygotsky believed the opposite, that there are no stages and development is continuous. Where there are a few areas that I relate with the theoretical views of John Piaget, I tend to relate more so with those of Vygotsky. Both were strong advocates for students having active participation in their learning. Like Vygotsky, I feel that learning and development are intertwined and in some cases learning can precede development. Vygotsky compared a learner’s actual development to their potential development; this potential area is called the â€Å"zone of proximal development†. When working with the children it is in this area that I observe any potential problem areas where a child might need help as well as recognize where I can push a child a little further in order to get them to reach their maximum potential. As far as instructional strategies, I tend to rely heavily on a Montessori style environment; where discovery, project based learning, and curiosity inducing strategies expands a child’s intellect. As a child care provider I often try to engage my pupil with activities and materials that challenge them. Most toys and instructional material I present to the children are usually slightly above their ages. Where Vygotsky felt that culture plays a large role in development, I too agree that development is improved when social interaction is guided by highly skilled people in the same culture.

Mattel Inc. Stock :: essays research papers fc

Mattel Inc. (MAT) The Mattel Company, best known for its Barbie dolls, is the world's largest toy maker. In March 1997, it acquired Tyco toys the third largest U.S.-based toy maker. Its product lines include Fisher-Price and Sesame Street preschool items, Disney-related products and Hot Wheel miniature vehicles.   Ã‚  Ã‚  Ã‚  Ã‚  They type of industry Mattel is located under, is dolls and stuffed toys, although they have other types of products such as Hot Wheels. This company is under monopolistic competition. They sell their products in many stores, such as Toys ‘R Us, KB Toys, K-Mart, Walmart, and others.   Ã‚  Ã‚  Ã‚  Ã‚  Some of Mattel’s competitors include Marvel Enterprises Inc. and Hasbro Inc. Marvel Enterprises (formerly Toy Biz) publishes comics based on more than 3,500 characters including Spider-Man, The Incredible Hulk, and the X-Men. The company, North America's top comic publisher through its Marvel Entertainment subsidiary, also makes action figures, games, and puzzles based primarily on its Marvel characters.   Ã‚  Ã‚  Ã‚  Ã‚  Hasbro is a worldwide leader in the design, manufacture and marketing of toys, games, interactive software, puzzles and infant products. Included in its offerings are games, traditional board and card, hand-held electronic and interactive CD-ROM, and puzzles, preschool, boys' action and girls' toys, dolls, plush products and infant products.   Ã‚  Ã‚  Ã‚  Ã‚  The company’s business activities include many things. The standards address a wide spectrum of issues, ranging from on-the-job concerns, such as factory lighting, air quality and health care facilities, to acceptable parameters for dormitories and recommendations for recreational programs. They serve as the principles by which Mattel's internal and independent monitoring programs are measured around the world. While the development of a code of conduct/manufacturing principles is essential to success, enforcement of the code is equally as important. Mattel has initiated an extensive three-stage auditing process, which is overseen by an independent monitoring council, to thoroughly inspect both the company's owned-and-operated facilities around the world, as well as those of all core contractors. If a contractor facility is either unable or unwilling to work with Mattel in order to meet and maintain its standards, however, Mattel will discontinue the workin g relationship.   Ã‚  Ã‚  Ã‚  Ã‚  I think that the stock price rose due to the company flourishing. Mattel has many extraordinary products that have been around for years, and many more to come. This company seems very stable. They keep their customers happy and keep them coming back for more. Now that the holidays are coming near, I predict that the company will do very well and the stock will go up once again.

Milk and Fresh Fruit Juice Essay

Breast milk can be produced fresh or can be frozen for use at a later date. Breast milk can be left for up to five days in a fridge with a tempeture of 4 degrees Celsius or lower, it can be left up to two weeks in the freezer compartment of a fridge. If the breast milk is frozen it can be left up to six months in a freezer with a tempeture of at least minus 18 degrees Celsius. It is recommended by the department of health that formula milk should be made fresh rather than made up in advance, for more convience liquid formula can be bought. If liquid formula isn’t available then a flask with boiling water can be made so formula can be made when needed. EYMP3-5.2 It is important to follow carer’s instructions regarding dietary requirements as some children will have severe reactions to some food. Diabetic children will have specific dietary requirements that need to be followed carefully because if not could lead to the child having low or high blood sugars. Children that have food intolerances may get diarrhoea if they are given foods that they are intolerant to. Children with known allergies should be supervised whilst eating. The signs of an allergic reaction are; swelling of the lips and eyes, redness of the face or other parts of the body. They could also start to itch or have difficulty breathing. Children with a severe may be prescribed an epi pen and training should be given before administrating. EYMP3-5.3 EYMP 3 – 5.4 Educating children in food management and portion control is very important as eating habits developed in childhood will continue into later life. Education starts with the parents and it is in the home where all children’s eating habits are formed. Leaflets should be given to parents when they give birth about properly feeding their children and the importance of nutritional value of food. Nurseries and schools should give regular newsletters to parents with the importance of nutritional value in foods. Educational establishments should educate children and parents about the importance of portion control and ensure that correct portion sizes are given. This message can be reinformed with smaller plates. Health Visitors, school nurseries, health professionals and dieticians are all crucial in spreading the message to children and parents about the importance of healthy eating and portion control. They are also crucial in checking that children are gaining weight healthily but not too much. Encouraging lots of physical play in school/nursery will help in keeping childrens weight under control. Educating children in the importance of not bullying other children who are overweight is also very important. SHC 32 – 1.1 Job description Look after children and ensure they are kept healthy and safe Ensure all health and safety guidelines are strictly adhered to Carry out risk assessments before any new activities/toys are introduced Devise educational and fun activities for children from age 4 to 11 Supervises activities Supervise children Read to the children Supervise toilet trips Prepare healthy and nutricious snacks for children Keep play areas clean and tidy Assist children with homework Baking with the children SHC 32 1.2 I am expected to follow the following codes of practice:- Safeguarding – ensuring that the children are kept safe whilst in our care and also be very observant as to what happens when the children are not in our care, ie if the children arrive with bruises or if they are upset, shaken or distressed when they arrive or as they are leaving. Also to make sure that other staff treat all the children well and do not mistreat any of them. Whistleblowing Policy – ensuring that if there is anything that we do not feel comfortable about, for example if we feel that one of the staff members are behaving inappropriately towards any of the children, we are expected to report this to our Manager to ensure that action is taken to prevent further mistreatment. Health & Safety at Work Act – acting responsibly in the environment in which we work. Ensuring that we follow all guidelines to keep our work place safe and that we keep ourselves, our colleagues and the children safe. National minimum standards – EYFS Welfare Requirements – ensuring that children are developing properly in line with targets set for their ages. National Occupational Standards – Ensuring that we conform to best practice set within the industry to make sure that we are complying with standards set. SHC 32 – 2.3 Working practices may be affected if hypothetically my Manager decided that a game of hopscotch was not appropriate for the young children to play but, as a younger person, I believed that it was a safe game to play. I would have a discussion with my Manager and explain why I thought it was safe and my Manager would explain that she had carried out a risk assessment for Hopscotch and decided that it was inappropriate. In a previous role, I did not agree with the way a member of staff disciplined young children when she was unhappy with their behaviour. She shouted at the child without coming down to their level or explaining what the child did. I was uncomfortable with this and brought it to the attention of my Manager who addressed this with the member of staff. This gave me the confidence and experience to ensure that I was very aware of the way my colleagues behaved and to take appropriate action when required. SHC 32 4.1 I have regular meetings with my Supervisor to discuss how I am progressing within my role and any feedback from parents or colleagues is passed on to me. I have regular meetings with my Manager to discuss my progression where I am asked if I need any additional help or whether I have any comments as to how we can make things better. I regularly meet with my colleagues to discuss planning and how we can make things better for the children and planning activities for the different age groups to ensure all our activities are consistent with each other. I have regular appraisals to monitor my progress and to give and receive feedback about my role and development. I have a college tutor who is there to help me develop my role, develop as an employee and develop my skills as I work towards my Level 3. I frequently research new activities and legislation on the internet to consistently develop. EYMP 4 – 4.1 It is key to review my practice to ensure that I am fully up to date with latest legislation as things change so frequently and it is important that children are always kept safe and parents are always kept fully informed. It is important to think critically about what I do in my work and analyse how I do it and why I do it that way and asses the effectiveness of what I am doing at work and how I can become more effective. It is something that we need to do regularly to get a clearer picture of what we do in our roles and assess whether we are being really effective.

Essay on Machiavellis The Prince Politics, War, and...

Machiavellis The Prince: Politics, War, and Human Nature [I]t is necessary for a prince to know well how to use the beast and the man. (Machiavelli, The Prince, p. 69[1]). In this swift blow, Niccolà ² Machiavelli seems to strike down many visions of morality put up on pedestals by thinkers before his time. He doesnt turn to God or to some sort of common good for his political morality. Instead, he turns to the individual?more specifically, self-preservation in a position of power. Machiavellis vision rules out the possibility of a higher political authority if higher is meant to say that the morality comes from the divine, but his vision certainly does not rule out any sort of higher political morality. To†¦show more content†¦Have they turned bad? Machiavelli?s answer is that they have always been bad. It should also be noted that the ?men involved in politics? in addition to those in government positions, also includes the general public who voices opinions on issues. Machiavelli believes that all men are partially bad . ?For one can say this generally of men: that they are ungrateful, fickle, pretenders and dissembles, evaders of danger, eager for gain.? (Machiavelli, p. 66). In context, Machiavelli?s statement is in the chapter ?Of Cruelty and Mercy, and Whether It Is Better to Be Loved Than Feared, or the Contrary.? He is using it to show that in order to rule successfully, a prince must also be ?bad,? or at least know what bad is. The introductory quote in this essay follows shortly after. Machiavelli believes that because all men are bad in some for or another, only a ruler who also holds and utilizes these traits when necessary can survive. ?Hence it is necessary to a prince, if he wants to maintain himself, to learn to be able not to be good, and to use this and not use it according to necessity.? (Machiavelli, p. 61). He goes further to say that if one prince didn?t step up, use the beast within him, and rule, another would in his place. Thus, sparing a population from cruel rule ( if that is what is necessary to ensure stability) spares them only temporarily from theShow MoreRelatedThe Transformative Works Of Niccolo Machiavelli s The Prince ( 1532 ) And Thomas More s Utopia1359 Words   |  6 Pagestransformative works Niccolo Machiavelli’s The Prince (1532) and Thomas More’s Utopia (1516) display vastly different opinions and perspectives on the relationship between virtue and politics, however some minor similarities between the two works can be noted. The Prince and Utopia create significant contributions to political theory offering different central claims on virtue and its relationship with politics. Another major point of difference between the two texts is the place that war has in their communitiesRead MoreAdolf Hitler to Machiavellis The Prince1671 Words   |  7 PagesWhen Machiavelli wrote The Prince in the 1500s, his intentions did not apply to the twentieth century. 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