Chapter 12.3

Key concepts: Explain how metallic bonds form. Describe the properties of metals.

Key Vocabulary: Metallic bond

Covalent Bond: Metallic bonds are formed by the attraction of positive metal ions and electrons in metal How does a metal ions form? – When metals LOSE electrons Outermost rings overlap…allows electrons to move freely… What is a bond? All metals are positive

Picture time!

Properties of Metallic Bonds: Malleable? Ductile? Conductivity? Bend with out breaking… – What happens when you hit a nail? Positive ions in a metal are always surrounded by and attracted to the electrons in the metal—even if the metal ions move. The electrons constantly move around and between the metal ions. The moving electrons maintain the metallic bonds no matter how the shape of the metal changes. --What terms do you remember? --Describe metals…

Pearls of Wisdom: In metallic bonding, the valence electrons move throughout the metal. A bond formed by the attraction between positive metal ions and the electrons in the metal is a metallic bond. Properties of metals include conductivity, ductility, and malleability. In metallic bonding, the valence electrons move throughout the metal. A bond formed by the attraction between positive metal ions and the electrons in the metal is a metallic bond. Properties of metals include conductivity, ductility, and malleability.

Homework: Question: – Page 323 – 3-11 Question: – Page 323 – 3-11