Bonding and Molecular Structure
This "topic" contains information from both chapter 8 and chapter 9 of the text book. Following is summary list of objectives:
Students should be able to relate atomic radius trends, bond length, bond order and bond strength, using the correct vocabulary to apply these concepts to either molecular or ionic compounds.
Students should be able to complete ranking tasks on the concepts above, when given a series of bonding element pairs.
Given quantitative data about bond enthalpies or latice energy, students should be able to calculate the reaction enthalpy for any balanced chemical equation.
Students should be able to explain the value and limitations of Lewis Dot representations of bonded compounds.
Students should be able to draw valid lewis dot structures for a variety of compounds. Students should recognize those rare cases where the octet rule is violated, and draw valid structures for those also.
Students should be able to recognize when multiple resonance structures are possible. Students should be able to explain the physical meaning of those multiple resonance structures, using formal charge to evaluate and rank the relative energy of each resonance form.
Students will be able to describe the characteristics of ionic vs covalent bonds, in terms of behavior in solution and electronic structure. Will be able to predict the nature of a given bond from electronegativities. Will be able to rank bonds in terms of the strength of dipole
Explain and apply VSEPR theory, including naming typical bond angles, names of electron domain geometry and names of molecular domain geometry, predicting geometry from formula.
Then ultimately determining the overall polarity of a compound from the geometry and known polarity of the bonds.
Describe properties of polar vs nonpolar molecules.
Explain and apply atomic orbital theory, sigma pi bonds. hybridization. However, the more advanced topic of molecular orbital theory (bonding/antibonding) will not be covered at this time.
The links to honors chemistry chapter 7
and chapter 8
include information relevant to this AP unit.
chem team info has good tutorials and practice problems in this content area
Tyler DeWitt has a good series of instructional videos. Start here
and search for topics of interest. However, be critical of his sometimes informal use of language, especially where he describes atomic scale attractions as "liking" or "wanting" rather than describing in terms of electrostatic force and coulomb's law.
related power point slides