1. • Describe a covalent bond as a shared pair of electrons.
Week 7
• Describe a covalent bond as a shared pair of electrons.
• Describe single and multiple covalent bonding.
• Use dot-and-cross diagrams to represent covalent bonding.
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2. Attraction in a covalent bond
Week 7
Attraction in a covalent bond
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3. Covalent bond formation in H2
Week 7
Covalent bond formation in H2
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4. Week 7 Covalent bonding in Cl2 © Pearson Education Ltd 2008
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5. Covalent bonding in H2O, NH3 and CH4
Week 7
Covalent bonding in H2O, NH3 and CH4
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6. Dot-and-cross diagrams of O2, N2 and CO2
Week 7
Dot-and-cross diagrams of O2, N2 and CO2
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7. • Describe dative covalent (coordinate) bonding.
Week 7
• Describe dative covalent (coordinate) bonding.
• Use dot-and-cross diagrams to represent covalent bonding.
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8. Dative covalent bonding in NH4+
Week 7
Dative covalent bonding in NH4+
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9. Week 7 The ammonium ion © Pearson Education Ltd 2008
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10. Week 7 The oxonium ion © Pearson Education Ltd 2008
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11. Dot-and-cross diagram of BF3
Week 7
Dot-and-cross diagram of BF3
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12. Dot-and-cross diagram of SF6
Week 7
Dot-and-cross diagram of SF6
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13. • Explain how the shape of a simple molecule is determined.
Week 7
• Explain how the shape of a simple molecule is determined.
• State that lone pairs of electrons repel more strongly than bonded pairs.
• Explain and predict the shapes of, and bond angles in, molecules and ions.
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14. Shapes of molecules with different numbers of bonded pairs
Week 7
Shapes of molecules with different numbers of bonded pairs
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15. Week 7 Drawing 3D diagrams © Pearson Education Ltd 2008
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16. Shapes of molecules with 0, 1, and 2 lone pairs
Week 7
Shapes of molecules with 0, 1, and 2 lone pairs
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17. Week 7 Shape of CO2 © Pearson Education Ltd 2008
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18. Week 7 Shape of NH4+ ion © Pearson Education Ltd 2008
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19. Describe the structures of simple molecular lattices.
Week 7
Describe the structures of simple molecular lattices.
Describe the structures of giant covalent lattices.
Explain physical properties of covalent compounds.
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20. Crystal structure of solid iodine
Week 7
Crystal structure of solid iodine
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21. Different forces in iodine
Week 7
Different forces in iodine
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22. Tetrahedral structure
Week 7
Tetrahedral structure
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23. Hexagonal layer structure
Week 7
Hexagonal layer structure
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