Presentation on theme: "Chapter 15 – Ionic Bonding and Ionic Compounds 15.1Electron Configuration in Ionic Bonding 15.2Ionic Bonds 15.3Bonding in Metals."— Presentation transcript:
Chapter 15 – Ionic Bonding and Ionic Compounds 15.1Electron Configuration in Ionic Bonding 15.2Ionic Bonds 15.3Bonding in Metals
15.1Electron Configuration in Ionic Bonding Valence Electrons Using electron configuration for describing compound formation… Valence electrons: the electrons in the highest occupied energy level of an atom. Na = 1s 2 2s 2 2p 6 3s 1 Cl = 1s 2 2s 2 2p 6 3s 2 3p 5 Use of electron dot structures, Table 15.1
15.1Electron Configuration in Ionic Bonding (cont.) Electron Configurations for Cations Octet Rule: In forming compounds, atoms tend to achieve the electron configuration of a noble gas.
15.1Electron Configuration in Ionic Bonding (cont.) Electron Configurations for Anions
15.2 Ionic Bonds Formation of Ionic Compounds Ionic Bond: the force of attraction between two oppositely charged ions by electrostatic attraction. Ionic Compounds…Figure 15.7 Visualizing Molecules Structural, “ball and stick”, space-filling Chemical Bonds: Small Molecules Chemical Bonds: Small Molecules
15.2 Ionic Bonds (cont.) Properties of Ionic Compounds Most are crystalline solids Large attractive forces between ions High melting points Coordination Number: the number of ions of opposite charge that surround an ion in a crystal. Conductivity of ionic solutions: Fig. 15.11
15.3Bonding in Metals Metallic Bonds and Metallic Properties Metallic bonds consist of the attraction of the free-floating valence electrons for the positively charged metal ions. These bonds are the forces of attraction that hold metals together. Figure 15.14 Chem ASAP!
15.3Bonding in Metals (cont.) Crystalline Structure of Metals and Alloys