Chapter 1 MULTIPLE CHOICE QUESTIONS Topic: Atomic Orbitals 1. A) B) C) D) E) In quantum mechanics a node (nodal surface or plane) is: a place where Ψ is negative. a place where Ψ is positive. a place where Ψ = 0. a place where Ψ2 is large. a place where Ψ2 is negative. Ans: C Topic: Atomic Orbitals‚ Molecular Orbitals 2. When the 1s orbitals of two hydrogen atoms combine to form a hydrogen molecule‚ how many molecular orbitals are formed? A) 1 B) 2 C) 3 D) 4 E) 5 Ans:
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Does it mean that black parents are very negligent? Or the fact that they are very poor? This reading tells us about a book by Dorothy Roberts titled Shattered Bonds: The Color of Child Welfare. This book tells us that poverty is the leading cause of children being put in foster care. We see that poverty led to women losing their children as a result of lack of healthcare‚ inadequate housing and an inability to
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Br Br2 Br2 CCl4 CCl4 Br No reaction BUT OH KMnO4 - KMnO4 - OH No reaction OH OH Conclusion: Benzene is stable to both Br2 / CCl4 and KMnO4 / -OH. Therefore‚ there is something unusual about the double bonds in benzene‚ the unsaturation is atypical / unique 2. Benzene undergoes substitution rather than addition reaction‚ i.e.‚ Br Br Br2 + HBr FeBr3 Br Addition product not observed This observation is contrary to that of unsaturated
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Differences Between Ionic and Covalent Compounds Abstract In chemistry‚ a compound is a substance formed from two or more elements‚ with a fixed ratio determining the composition. A defining characteristic of a compound is that it has a chemical formula. Formulas describe the ratio of numbers of atoms in a substance. Compounds may have a number of possible phases. For a compound to be a liquid or a gas and still be called a compound‚ atoms from the various elements must be stuck together in
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Exercise Solution – Day 8 1. Answer the following questions. 1A. What do the acronyms SDLC and DBLC mean‚ and what do they portray? SDLC = Systems Development Life Cycle (SDLC) DBLC = Database Life Cycle 1B. What is the relationship between the SDLC and the DBLC? The SDLC traces the history (life cycle) of an information system. The DBLC traces the history (life cycle) of a database system. Since we know that the database serves the information system‚ it
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When ionic solids dissolve‚ they divide to give their positive and negative ions that make up the solids. These ions become hydrates and have the same relative proportions when in solution and when solid. The more the solid dissolves‚ the more the ion’s concentration increases. This increase and build-up allows for the reverse reaction to occur. In this phase of the reaction the ions crystallise out in order for the reaction to have a greater chance of occurring. Eventually the rate of
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Plagiarism is when someone uses someone else’s work without giving them credit. “According to the Merriam-Webster Online Dictionary‚ "plagiarize" means: to steal and pass off (the ideas or words of another) as one ’s own to use (another ’s production) without crediting the source to commit literary theft to present as new and original an idea or product derived from an existing source” (Plagiarism.org‚ 2013) Plagiarism is not being truthful about your own work and trying to rewrite in
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I admit I made a mistake Over stepping some boundaries which made me look fake. I always said I would never do the things I did‚ and that is the reason it is so hard for you to forgive. It’s been so long‚ so many times we said we’d try only to turn around and make each other cry Remember how it was when we first started out‚ So much alike‚ we shared every thought We fell so fast‚ maybe fell in love too soon Made a huge decision that now we cannot undo. I admit my mistakes
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Social Bond Theory Social bond theory was created by Travis Hirschi and it is a form of social control theory. Social control theorists are more interested in explaining why someone is not being deviant rather than why they are. In this theory it is expected that deviance will occur at some point. Hirschi’s social bond theory explains that deviane is expected to occur because crime is easy to do; you do not need any special skills to commit crimes. Everyone has the same amount of motivation to
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Lab #4 May 26‚ 2015 Diels Alder Reaction Introduction: Diels Alder Reaction is the reaction of a diene with a species capable of reacting with the diene‚ the dienophile. A diene is a hydrocarbon that contains two carbon double bonds‚ while a dienophile is an electron-deficient alkene. The Diels-Alder is also called a [4+2] cycloaddition because a ring is formed by the interaction of four pi electrons of the alkene with two pi electrons of the alkene or alkyne. The product of the Diels-Alder
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