Chapter02SolutionsManual - Chapter 2 Molecular...

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Chapter 2 Molecular Representations Review of Concepts Fill in the blanks below. To verify that your answers are correct, look in your textbook at the end of Chapter 2. Each of the sentences below appears verbatim in the section entitled Review of Concepts and Vocabulary . In bond-line structures , _______atoms and most ________ atoms are not drawn. A ________________ is a characteristic group of atoms/bonds that show a predictable behavior. When a carbon atom bears either a positive charge or a negative charge, it will have ___________, rather than four, bonds. In bond-line structures, a wedge represents a group coming ______ the page, while a dash represents a group _________ the page. ___________ arrows are tools for drawing resonance structures. When drawing curved arrows for resonance structures, avoid breaking a _______ bond and never exceed _____________ for second-row elements. There are three rules for identifying significant resonance structures: 1. Minimize ____________. 2. Electronegative atoms can bear a positive charge, but only if they possess an ________ of electrons. 3. Avoid drawing a resonance structure in which two carbon atoms bear _____________ charges. A ______________ lone pair participates in resonance and is said to occupy a ____ orbital. A _____________ lone pair does not participate in resonance. Review of Skills Fill in the blanks and empty boxes below. To verify that your answers are correct, look in your textbook at the end of Chapter 2. The answers appear in the section entitled SkillBuilder Review . SkillBuilder 2.1 Converting Between Different Drawing Styles (CH 3 ) 3 COCH 3 DRAW THE LEW IS STRUCTURE OF THE FOLLOW ING COMPOUND
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CHAPTER 2 17 SkillBuilder 2.2 Reading Bond-Line Structures N N O Cl CIRCLE ALL CARBON ATOMS IN THE COMPOUND BELOW DRAW ALL HYDROGEN ATOMS IN THE COMPOUND BELOW N N O Cl SkillBuilder 2.3 Drawing Bond-Line Structures DRAW A BOND-LINE DRAWING OF THE FOLLOWING COMPOUND: H C C O H H O H C H H C C C C H C C H H H H H H H SkillBuilder 2.4 Identifying Lone Pairs on Oxygen Atoms O O O AN OXYGEN ATOM WITH A NEGATIVE CHARGE WILL HAVE ____ LONE PAIR(S) AN OXYGEN ATOM WITH NO FORMAL CHARGE WILL HAVE ____ LONE PAIR(S) AN OXYGEN ATOM WITH A POSITIVE CHARGE WILL HAVE ____ LONE PAIR(S) SkillBuilder 2.5 Identifying Lone Pairs on Nitrogen Atoms N N N A NITROGEN ATOM WITH NO FORMAL CHARGE WILL HAVE ____ LONE PAIR(S) A NITROGEN ATOM WITH A POSITIVE CHARGE WILL HAVE ____ LONE PAIR(S) A NITROGEN ATOM WITH A NEGATIVE CHARGE WILL HAVE ____ LONE PAIR(S) SkillBuilder 2.6 Identifying Valid Resonance Arrows RULE 1: THE TAIL OF A CURVED ARROW CANNOT BE PLACED ON A ______________ RULE 2: THE HEAD OF A CURVED ARROW CANNOT RESULT IN _____________________ ________________________________________ TAIL HEAD SkillBuilder 2.7 Assigning Formal Charges in Resonance Structures O O INDICATE THE LOCATION OF THE NEGATIVE CHARGE IN THE SECOND RESONANCE STRUCTURE BELOW SkillBuilder 2.8 Drawing Significant Resonance Structures
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This note was uploaded on 02/04/2012 for the course CHEM 3303 taught by Professor Rahman during the Fall '11 term at University of Central Oklahoma.

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Chapter02SolutionsManual - Chapter 2 Molecular...

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