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AQA A Level Chemistry

Metallic
Bonding

This section covers metallic bonding as attraction between delocalised electrons and positive ions arranged in a lattice. It also links metallic bonding and structure to physical properties such as melting point and electrical conductivity.

Exam Papers
Paper 1 & 2
7405/1 and 7405/2
Specification Points
3.1.3.3 & 3.1.3.4
Metallic bonding and properties
Topic Parts
2 parts
Revision notes available
Exam Board
AQA
AQA 7405

Revision Notes

Work through metallic bonding and the physical properties of metals in sequence.

Metal lattice
Metallic
Bonding
1
Available

Metallic Bonding and Structure

Metallic bonding, delocalised electrons and positive ions arranged in a lattice.

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Properties
Physical
Properties
2
Available

Physical Properties of Metals

Melting point and conductivity explained using metallic structure and bonding.

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Specification Coverage

Metallic Bonding – AQA A Level Chemistry

The following AQA specification points outline the knowledge and skills students are expected to demonstrate for metallic bonding and related physical properties.

3.1.3.3
Metallic bonding
Metallic bonding involves attraction between delocalised electrons and positive ions arranged in a lattice.
3.1.3.4
Bonding and physical properties
The four types of crystal structure:
– ionic
– metallic
– macromolecular (giant covalent)
– molecular.
The structures of the following crystals as examples of these four types of crystal structure:
– diamond
– graphite
– ice
– iodine
– magnesium
– sodium chloride.
Students should be able to:
1
relate the melting point and conductivity of materials to the type of structure and the bonding present
2
explain the energy changes associated with changes of state
3
draw diagrams to represent these structures involving specified numbers of particles.