1. 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
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2. 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
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3.
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4. 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”
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5. 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
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6. 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
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7. END OF 7.3
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