GCSE Combined Science (AQA)

622 videos | 38 hours

Alloys

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Bonding, structure, and the properties of matter How bonding and structure are related to the properties of substances

Alloys

2:23 Structure and Properties of Metals and Alloys
Spec 4.2.2.7
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  • Metals in the periodic table are known as pure metals.
  • Metals are located on the left-hand side of the periodic table and are colored yellow in the video.
  • Pure metals consist of atoms of the same type, arranged in layers.
  • Atoms in pure metals are the same size and arranged regularly in individual layers.
  • Layers in pure metals can slide over each other, allowing metals to be bent and shaped.
  • Pure metals are malleable or bendable, making them too soft for many uses.
  • Alloys are mixtures of metals and are common and useful.
  • Brass is an example of an alloy, made from copper and zinc atoms.
  • Metallic bonding occurs in alloys, maintaining a metallic structure with metallic bonds.
  • Alloys are harder than pure metals.
  • Different sized atoms in an alloy distort the layers of atoms in the structure.
  • In brass, zinc and copper atoms are of different sizes, causing distorted layers.
  • Distorted layers make it difficult for them to slide over each other, making alloys less bendable or shapeable.

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