Energy gained upon converting a gas of ion pairs to a crystal array.Understand that the energy change in chemical reactions is path independent.Īrchived Lecture Notes #1 (PDF), Sections 6, 7Īrchived Lecture Notes #2 (PDF), Sections 1, 2įlash and JavaScript are required for this feature.Explain what features of a crystal are reflected in its Madelung constant.List the properties of ionic crystals, and relate them to the lattice energy.
Sketch the potential energy as a function of inter-ionic separation.Understand the valence shell electron pair repulsion (VSEPR) model.Describe quantitatively the energetic factors and characteristics involved in the formation of an ionic bond.Learning ObjectivesĪfter completing this session, you should be able to: Sadoway discusses the shortcomings of ionic bonding and Lewis's concept of shell filling by electron sharing including the Lewis dot notation ( Session 9) and returns to the valence shell electron pair repulsion (VSEPR) model in Session 11: The Shapes of Molecules. Octet stability and what it means in terms of shell filling ionic bonding and its formation as a result of Coulombic attraction between a cation and an anion ( Session 7).Sodium chloride (NaCl), manganese (Mn), sodium (Na), potassium (K), silver iodide (AgI), neon (Ne), magnesium oxide (MgO), aluminum (Al), aluminum oxide (Al 2O 3), cryolite (Na 3AlF 6)ĭesign of thermal abrasion resistance materials, design of inert anode materialsīefore starting this session, you should be familiar with: ion lattice, and properties of ionic crystals, enthalpy of reaction: Hess's law, Born-Haber cycleīorn exponent, cation, anion, covalent bond, ionic bond, valence shell electron pair repulsion model (VSEPR), interionic separation, crystal array, omnidirectional bond, unsaturated bond, Avogadro's number, electrostatic energy, ionic solid, Madelung constant, melting point, boiling point, electrical insulator, hardness, brittle, soluble, polar solvent, noble gas, ionic liquid, photon, transparency, binding energy, hybridized bond, elasticity, enthalpy, ionization energy, sublimation, electron affinity, lattice energy, bonding electron, nonbonding electron, molecular architecture Ionic bonding: octet stability by electron sharing, energy of ion pairs vs.