Chemistry (AS Level)·Chemical bonding · NSSCAS 1.3.5–1.3.6
Metallic bonding, structures & properties
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This lesson pulls all of bonding together. Meet metallic bonding — positive ions in a sea of delocalised electrons — then survey the five great lattice structures and learn to deduce the type of bonding and structure of any substance from its physical properties.
What you'll learn in this lesson
By the end you should be able to (NSSCAS Chemistry (AS Level) 1.3.5–1.3.6):
- Describe metallic bonding as a lattice of positive ions in a sea of delocalised electrons
- Explain the conductivity, melting point and malleability/ductility of metals from their bonding
- Describe the lattice structures: ionic, simple molecular (I₂, fullerenes), giant molecular (SiO₂, diamond, graphite, graphene), hydrogen-bonded (ice), metallic (Cu)
- Explain changes of state in terms of the energy to break bonds or weaken intermolecular forces
- Deduce the type of bonding and structure of a substance from given information
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