The Main Types of Chemical Bonds

Atoms are the basic building blocks of all types of matter. Atoms link to other atoms through chemicals bonds resulting from the strong attractive forces that exist between the atoms. A chemical bond is a region that forms when electrons from different atoms interact with each other. The electrons that participate in chemical bonds are the valence electrons, which are the electrons found in an atoms outermost shell. When two atoms approach each other these outer electrons interact. Electrons repel each other, yet they are attracted to the protons within atoms. The interplay of forces results in some atoms forming bonds with each other and sticking together. Main Types of Chemical Bonds The two main types of bonds formed between atoms are ionic bonds and covalent bonds. An ionic bond is formed when one atom accepts or donates one or more of its valence electrons to another atom. A covalent bond is formed when atoms share valence electrons. The atoms do not always share the electrons equally, so a polar covalent bond may be the result. When electrons are shared by two metallic atoms a metallic bond may be formed. In a covalent bond, electrons are shared between two atoms. The electrons that participate in metallic bonds may be shared between any of the metal atoms in the region. Predict Type of Chemical Bond Based on Electronegativity If the electronegativity values of two atoms are similar: Metallic bonds form between two metal atoms.Covalent bonds form between two non-metal atoms. Nonpolar covalent bonds form when the electronegativity values are very similar, while polar covalent bonds form when the electronegativity values are a little further apart. If the electronegativity values of two atoms are different, ionic bonds are formed.

The Main Types of Chemical Bonds

Atoms are the basic building blocks of all types of matter. Atoms link to other atoms through chemicals bonds resulting from the strong attractive forces that exist between the atoms. A chemical bond is a region that forms when electrons from different atoms interact with each other. The electrons that participate in chemical bonds are the valence electrons, which are the electrons found in an atoms outermost shell. When two atoms approach each other these outer electrons interact. Electrons repel each other, yet they are attracted to the protons within atoms. The interplay of forces results in some atoms forming bonds with each other and sticking together. Main Types of Chemical Bonds The two main types of bonds formed between atoms are ionic bonds and covalent bonds. An ionic bond is formed when one atom accepts or donates one or more of its valence electrons to another atom. A covalent bond is formed when atoms share valence electrons. The atoms do not always share the electrons equally, so a polar covalent bond may be the result. When electrons are shared by two metallic atoms a metallic bond may be formed. In a covalent bond, electrons are shared between two atoms. The electrons that participate in metallic bonds may be shared between any of the metal atoms in the region. Predict Type of Chemical Bond Based on Electronegativity If the electronegativity values of two atoms are similar: Metallic bonds form between two metal atoms.Covalent bonds form between two non-metal atoms. Nonpolar covalent bonds form when the electronegativity values are very similar, while polar covalent bonds form when the electronegativity values are a little further apart. If the electronegativity values of two atoms are different, ionic bonds are formed.

The Main Types of Chemical Bonds

Atoms are the basic building blocks of all types of matter. Atoms link to other atoms through chemicals bonds resulting from the strong attractive forces that exist between the atoms. A chemical bond is a region that forms when electrons from different atoms interact with each other. The electrons that participate in chemical bonds are the valence electrons, which are the electrons found in an atoms outermost shell. When two atoms approach each other these outer electrons interact. Electrons repel each other, yet they are attracted to the protons within atoms. The interplay of forces results in some atoms forming bonds with each other and sticking together. Main Types of Chemical Bonds The two main types of bonds formed between atoms are ionic bonds and covalent bonds. An ionic bond is formed when one atom accepts or donates one or more of its valence electrons to another atom. A covalent bond is formed when atoms share valence electrons. The atoms do not always share the electrons equally, so a polar covalent bond may be the result. When electrons are shared by two metallic atoms a metallic bond may be formed. In a covalent bond, electrons are shared between two atoms. The electrons that participate in metallic bonds may be shared between any of the metal atoms in the region. Predict Type of Chemical Bond Based on Electronegativity If the electronegativity values of two atoms are similar: Metallic bonds form between two metal atoms.Covalent bonds form between two non-metal atoms. Nonpolar covalent bonds form when the electronegativity values are very similar, while polar covalent bonds form when the electronegativity values are a little further apart. If the electronegativity values of two atoms are different, ionic bonds are formed.

The American Dream - 1655 Words

The American Dream is embedded in the Declaration of Independence, a founding document that articulates the idea that â€Å"all men are created equal† with the rights to bear â€Å"Life, Liberty, and the pursuit of Happiness† (Declaration of Independence). A path to citizenship is a proposition to resolve the policy failures concerning illegal immigration and the eleven million undocumented immigrants living in the United States (Inspired by Suro). Each individual will be able to act as a constituent of the American kindred and contribute to the prosperity of American society with the grants of summoning immigration reform. Allowing immigrants to attain full privileges and benefits sustained by a citizen can unlock significant economic affluence to the United States, including an increase in employment wage gains, which will in turn strengthen the taxation policy and social security system; a favorable investment in education; elevated labor productivity; enhancement of entrepreneurship, which will create new businesses; along with a feasible path to equality and stability for the nation that will increase cultural contributions as well as reduce crime rates. This research report will identify and discuss the various economic, educational, social, and cultural benefits that citizenship for unauthorized immigrants holds, along with evaluate the drawbacks suitable to answering the question: Should the United States provide unauthorized immigrants the right to citizenship? To beginShow MoreRelatedImmigrants And The American Dream1362 Words   |  6 PagesImmigrants and the American Dream In the article â€Å"The American Dream†, by James Truslow Adams in The Sundance Reader book, he stated that the American dream is that dream of a land in which life should be better and richer and fuller for everyone, with opportunity for each according to ability or achievement. It is a difficult dream for the European upper classes to interpret adequately, and too many of us ourselves have grown weary and mistrustful of it. It is not a dream of motor cars and highRead MoreThe American Dream By Kimberly Amadeo1637 Words   |  7 PagesNowadays, a large number of people migrate to the United States to work and achieve the American Dream. According to the Article â€Å"What is the American Dream?† by Kimberly Amadeo, â€Å"The American Dream was first publicly defined in 1931 by James Truslow Adams in Epic of America. Adam’s often-repeated quote is, ‘The American Dream is that dream of land in which life should be better and richer and fuller for everyon e, with opportunity for each according to ability or achievement.’† There are many peopleRead MoreAnalysis Of The Movie The American Dream 754 Words   |  4 Pages Nyreel Powell Ms. Jones American Literature 1 June 2015 The American dream in A Raisin in the Sun Have you ever had a dream and it didn’t come how you wanted it to be? Have you ever had accomplishments that you wanted to achieve but people were getting in the way of them? The four main characters in this book all have good dreams but there are people in the way of getting to those dreams or their dream is too high to accomplish. A Raisin in the Sun a play written by Lorraine Hansberry, andRead MoreSister Carrie and the American Dream1618 Words   |  7 PagesThe American Dream is surely based on the concept of â€Å"Life, Liberty and the Pursuit of Happiness† but it is above all, a matter of ambition. James Truslow Adams, an American writer and historian, in 1931 states: life should be better and richer and fuller for everyone, with opportunity for each according to ability or achievement†, which not only points towards a better standard of living for Americans but also denounces a degree of greed in the US society. Ambition not only â€Å"killed the catâ₠¬  butRead MoreGrapes Of Wrath And The American Dream1644 Words   |  7 PagesThe idea of the American Dream is ever changing depending on the person and the time of life that person is in. Although the main ideas of the American Dream remain the same to be educated, economically sound, healthy, to have a family, and equal rights. Many great films and works of literature were created to show case all the different ideas people have for their American Dream. The film â€Å"Grapes of Wrath† directed by John Ford and the poem â€Å"I Will Fight No More Forever† by Chief Joseph, both depictRead More Destruction of the American Dream Essay2145 Words   |  9 PagesDestruction of the American Dream I’ve talked about it in the past, the destruction of the American Dream. Always, there have been papers, writings, and thoughts that quantify a particular section of its ultimate demise, be it due to money, education, or sexuality. Maybe the destruction cannot be viewed as a singular event or cause. Perhaps instead it must be examined as a whole process, the decay and ultimate elimination of a dream. Self destruction, if you will†¦ Mr. Self Destruct Read MoreSuccess As One Of The American Dream1137 Words   |  5 PagesApril 2015 Success as One of The American Dream When we hear the word â€Å"success†, we often think of wealth and money. To some people, the embodiment of being success is earning a lot of money. In fact, the concept of success is primarily based on how much money a person earns. However, each person views the definition of success differently. One way to define success is something that has more to do with flash than it does with substance. John Wooden, an American basketball player and coach viewRead MoreJim Cullen And The American Dream2081 Words   |  9 Pages The American Dream, as defined by Cullen, is starting your goal off with a little and ending with more; it s like a business, you invest in it in order to gain more money. Usually, people will define the American Dream as being able to achieve your goal because everyone is offered opportunities. Cullen does acknowledge that people are born with different opportunities, so he talks about the good life. The good life describes different factors that determine your opportunities. Throughout the otherRead MoreFactors Influencing The American Dream1834 Words   |  8 Pagesindividual to succumb or to not succumb to the seductions of crime. These three factors are brilliantly portrayed in the television show, Breaking Bad and the novel, The Stick Up Kids. The American Dream is what many American citizens strive for. However, not all of those citizens are able to achieve the American Dream through a legal pathway. The reason an indivudal may not being able to do so is because of his or her background factors. It is important to note that background factors are a fractionRead MoreShark Tank And The American Dream1755 Words   |  8 PagesShark Tank and The American Dream The TV show Shark tank embodies everything the American dream represents. The show obtains successful Entrepreneurs ready to invest their own money into other Americans wanting to be just like them, reaching the American dream and become a successful entrepreneur. The show presents entrepreneurs working towards the goal of creating a business to not only gain wealth but also change the way we live today. The show is to keep the American dream alive and well while

Polymer Processing Free Essays

Chapter 3. Polymer Processing Polymer Process Techniques Fig. 3. We will write a custom essay sample on Polymer Processing or any similar topic only for you Order Now 1. Procedure for casting sheets of polymer. Polymer Materials Page ? 2 Polymer Process Techniques HEMA = hydroxyethyl methacrylate EGDMA = ethylene glycol dimethacrylate Fig. 3. 2. Centrifugal mold for poly(hydroxyethyl methacrylate) contact lenses Solvent casting of films Fig. 3. 3. Laboratory spreading device for the solution casting of films. Polymer Materials Page ? 3 Polymer Process Techniques Roll casting Fig. 3. 4. Knife coating of a polymer onto a film. Polymer Materials Page ? 4 Polymer Process Techniques Fig. 3. 5. Polymer casting bench. Polymer Materials Page ? 5 Polymer Process Techniques Fig. 3. 6. Solution casting of films on an industrial scale with the use of rotating metal drums. Polymer Materials Page ? 6 Polymer Process Techniques Fig. 3. 7. Use of a moving-belt system for the continuous solution casting of polymer films. Polymer Materials Page ? 7 Polymer Process Techniques Fig. 3. 8. ‘Bubble’ blowing of films. Polymer Materials Page ? 8 Polymer Process Techniques Fig. 3. 9. Film manufacture by calendering. Polymer Materials Page ? 9 Polymer Process Techniques Methods for melt processing of films Fig. 3. 10. Hydraulic press for the melt pressing of polymer films. Polymer Materials Page ? 10 Polymer Process Techniques Fig. 3. 11. Sequence of operations for the melt extrusion of polymer films. Polymer Materials Page ? 11 Polymer Process Techniques Fig. 3. 12. Diagram of a plastics extruder. Polymer Materials Page ? 12 Polymer Process Techniques Fig. 3. 13. Diagram of a compression-molding press and mold. Polymer Materials Page ? 13 Polymer Process Techniques Melt process Fig. 3. 14. Diagram of an injection-molding machine. Polymer Materials Page ? 14 Polymer Process Techniques Fig. 3. 15. Thermoforming of polymer sheets. Polymer Materials Page ? 15 Polymer Process Techniques Fig. 3. 16. ‘Plug flow reactor’ to manufacture radiation crosslinked tubings or belts. Polymer Materials Page ? 16 Polymer Process Techniques Reaction Injection Molding (RIM) Advantages: ? Large parts ? Low viscosity ? Inexpensive Materials : ? Urethanes ? Polyureas ? Nylon ? Polyolefins Fig. 3. 17. Reaction injection molding (RIM) device to produce reinforced polyurethanes. ? Cylinder charged with diol and triol plus dibutyltin dilaurate ? Cylinder charged with molten diisocyanate ? Half of split mold ? Half of split mold ? Cavity to be filled with reinforcing fiber, then with mixed liquid from nozzle ? Nozzle for mixing streams from ? and ? Polymer Materials Page ? 17 Polymer Process Techniques Fig. 3. 18. Apparatus for the laboratory wet spinning of fibers. Polymer Materials Page ? 18 Polymer Process Techniques Fig. 3. 19. Use of a motor-driven syringe pump for the laboratory preparation of wet-spun fibers. Polymer Materials Page ? 19 Polymer Process Techniques Fig. 3. 20. Laboratory assembly for the ry spinning of fibers. Polymer Materials Page ? 20 Polymer Process Techniques Fig. 3. 21. Industrial wet spinning. Polymer Materials Page ? 21 Polymer Process Techniques Fig. 3. 22. Laboratory or pilot-plant equipment for the melt extrusion of fibers. Polymer Materials Page ? 22 Polymer Process Techniques Fig. 3. 23. Manufacturing equipment for the dry spinning of fibers. Polymer Materials Page ? 23 Polymer Process Techn iques Fig. 3. 24. Equipment for the melt spinning of fibers on an industrial scale. Polymer Materials Page ? 24 Polymer Process Techniques Fig. 3. 25. Three methods for the continuous orientation of synthetic fibers. (a) The fiber passes round a ‘peg’ which stabilizes the stretch orientation being induced by the faster-turning set of rollers. (b) The faster-turning drum stretches the polymer in the orientation zone. With this technique some difficulty may be experienced with stabilization of this zone. (c) The two drums turn at the same speed. But the fiber is stretched because of the greater circumference of the second drum. Polymer Materials Page ? 25 Polymer Process Techniques Processing of Elastomers (Vulcanizable) Fig. 3. 26. Reactor to manufacture four-ply valcanized rubber belts. Polymer Materials Page ? 26 Polymer Process Techniques Fig. 3. 27. Tire molding process Polymer Materials Page ? 27 Polymer Process Techniques Composite Laminate Processing Fig. 3. 28. Plug-flow reactor to form epoxy resin preimpregnated sheet. Polymer Materials Page ? 28 Polymer Process Techniques Fig. 3. 29. ‘Batch reactor’ to manufacture glass-fiber reinforced polyesters. Polymer Materials Page ? 29 Polymer Process Techniques Fig. 3. 30. Procedure used to manufacture fiber reinforced epoxy resins. Polymer Materials Page ? 30 How to cite Polymer Processing, Papers

Winning the Lottery free essay sample

Winning the lottery is the ultimate dream in everyones life. It is an easy game and requires very less amount of money to play, but the chances of winning are a one in a million. In everyones mind, spending their last dollar bill on a ticket and pick out random numbers may turn their life around in a positive and joyful way. In fact, winning the lottery could bring someones life more than just joy, it could turn their life into a living nightmares. Despite the risks on winning the lottery, more and more people are drawn to the idea of winning a fortune amount of money by playing guessed numbers and spending less money. Throughout the years, study shows that more and more lottery winners have had experienced the nightmares of winning the lottery ticket, this includes life at risk, depression, and death. Life at risk is known to be the most common effect on lottery winners. We will write a custom essay sample on Winning the Lottery or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Lottery winners are more expose to danger because of the lack of experience, carelessness, security and privacy. One winner for example, 45 years old name Jack Whittaker, who won a power ball lottery ticket worth of $314. 9 million dollars in West Virginia in December 2002. Shorty after winning, rubbers constantly breaks in into his properties and stole whatever they desire, he later start hiring local police of duty to guard his house and being his body guard. Lottery winners are not only exposing to the outside dangers from strangers, but also the danger from within the family. William Bud Post III, for example, he won $16. 2 million dollars in 1988. In 1993, five years after winner, his brother was convicted of hiring a hit man to kill him and his wise. In 2007, in Daytona, Ohio a wife who was sent to prison after trying to kill her husband when discovered he had won a $3. 5 million in lottery ticket. Although winning the lottery might be a risk to someones life, it is a chance of a life time that everyone cant seems to pass. Second common effect of lottery winners is fear and anxiety. . cover up the fact that winning a million dollars lottery could also comes with nightmares. The idea of winning a million dollars lottery could change your life, Study shows that winning the lottery could bring more than joy in someones life. In fact, it could turn someones life in to a nightmares. For example; life at risk, depression, sudden illness, and death. Jeff Dampier who won $20 million in the Illinois Lottery in 1986, was kidnapped and killed by his sister in law