Study Guide for Chapter 6 Exam Chemistry This is a general guideline of the things you should know and be able to do in order to be successful on the chapter 6 test. It is important, not only to study, but to study wisely! Study the skills and concepts that you are struggling with and make sure to practice the skills you must demonstrate….practice drawing Lewis structures, predicting molecular geometry, etc. As always, all vocab that we have learned from the chapter could be on the test, so make sure you know the terminology. 6.1 Be able to: Explain what a chemical bond is and why most atoms form chemical bonds (octet rule) Describe ionic and covalent bonding. Explain how they are similar and why most bonds are not purely covalent or purely ionic. Classify bonding type according to differences in electronegativity. 6.2 Be able to: Explain the relationship between bond length and bond strength. Understand the relationship between distance between approaching atoms and bond length. State/explain the octet Be able to explain and apply the Lewis structure in order to demonstrate how atoms bond to one another to form molecules. Demonstrate and explain resonance structures. 6.3 Be able to: Compare and contrast the chemical formula for a molecular (covalent) compound and an ionic compound Explain the arrangement of ions in crystals. Explain lattice energy. Write the Lewis structure of a polyatomic ion. Make sure to use [ ]+/- only when dealing with polyatomic ions. 6.4 Be able to explain metallic bonding and explain why metals have characteristic properties such as malleability, ductility, conductivity, and why they are shiny due to metallic bonding. 6.5 Be able to: Explain the VSEPR Theory and apply this theory to predict shapes of molecules and polyatomic ions. Describe dipole-dipole forces, Hydrogen bonds, and London Dispersion Forces (LDF) and how the effect characteristic properties of compounds. (Boiling point, melting point, solubility) Explain what determines molecular geometry and be able to predict the polarity of a molecule based on the molecular geometry.