Chapter 7 Ionic and Metallic Bonding 7.3 Bonding in Metals 7.1 Ions 7.2 Ionic Bonds and Ionic Compounds 7.3 Bonding in Metals Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.

Which of the following compounds are most likely not ionic? Do Now Which of the following compounds are most likely not ionic? Na2O CO2 CaS SO2 NH3 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

https://www.youtube.com/watch?v=fvD_nJu_khY Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.

Metallic Bonds and Metallic Properties Formed between two or more cations (metals). Valence electrons are mobile. They move around and are shared by all atoms. Modelled as a “sea of electrons” Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.

Metallic Bonds and Metallic Properties Properties of Metals Conductors of electric current electrons can flow freely in the metal. Ductile: can be drawn into wires Malleable: can be hammered or pressed When subjected to pressure, cations slide past one another Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.

Alloys Mixtures of elements with at least one metal Properties are superior to its components Corrosion resistance Ductility Hardness Toughness Examples Brass = Cu + Zn Steel = Fe + C + B,Cr,Mn,Mo,Ni,W,V Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.

END OF 7.3 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.