BSC2010 Exam #1 Study Guide Covering Chapters 2-5 To remind you, the exam itself is 50 questions consisting of T/F and multiple-choice questions worth 1.5 points/each for a total of 75 points. I ask an equal number of questions from each chapter. In every chapter , words which appear in bold are worth knowing, and I recommend making flash cards for these. I also recommend focusing on the Level I and Level II questions at the end of each chapter, as exams are not just about regurgitating facts but also include some synthesis and analysis problems. Chapter 2: In addition to knowing the bolded terms in this chapter, make certain you understandthe concepts behind each. For example, you know I’m sure that a cation is positively charged, but what would make a particular atom have this excess of a positive charge? Likewise, you know that isotopes of an element differ in the number of neutrons each has, but how does this affect other aspects of the atom, if at all? Have slightly different masses but What information can things like the atomic mass, atomic number, and atomic mass number tell you about an atom? What determines each? What is the nature of the various subatomic particles which comprise an atom? Which contribute to mass? Which to bonding behavior? Know how the various bonds we discussed are formed, and what factors determine which bond is formed between two atoms. Understand the implication of each of the different types of bonds in terms of the chemical behavior of a molecule.
the more electronegative an atom, the more strongly it pulls shared electrons toward itself In a nonpolar covalent bond , the atoms share the electron equally In a polar covalent bond , one atoms is more electronegative, and the atoms do not share the electron equally Unequal sharing of electrons causes a partial positive or negative charge for each
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