Metallic Bonding - PowerPoint PPT Presentation

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Metallic Bonding

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  1. Metallic Bonding • sea of free floating valence electrons • not attached to any one atom • free to move • Properties: • malleable • ductile • good conductor of heat and electrons

  2. Ionic vs Covalent Properties Ionic Covalent Metal/Nonmetal Nonmetal/Nonmetal High melting point Low melting point Crystalline structure Amorphous Good Conductors Poor Conductors (molten or aq)

  3. Oxidation Numbers 1. Free = 0 natural state includes diatomic H2, N2, O2, F2, Cl2, Br2, I2 2. Ion charge = oxidation # 3. Sum = 0 4. H = +1 (unless told otherwise) 5. O = -2 (unless told otherwise 6. Family 1A = +1 and Family 2A = +2