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Year 10 - Science

Metallic structure and properties

Structure and bonding

Unit Summary

This unit explores changes of state, particle kinetics, and energy transfers in relation to chemical bonding, including ionic, covalent, and metallic bonds. It examines carbon's unique bonding properties, leading to organic compounds and materials like diamond, graphite, fullerenes, and graphene.

Lesson Summary

You will learn to describe the properties of metals and relate these to a model of the structure of metals.

Key Notes

  • Metals are good electrical conductors and good thermal conductors.
  • Metals can be stretched into wires, or bent/hammered into different shapes.
  • Individual atoms do not have the physical properties of the substances that contain them.
  • Metallic structures consist of positive ions and free–moving outer shell electrons.
  • Electrostatic forces of attraction between ions and free electrons bind them all together in a giant metallic structure.

Vocabulary To Learn

  • malleable: A malleable substance can be hammered or pressed into shape without breaking.
  • ductile: A ductile substance has the ability to be drawn into a wire.
  • delocalised: Electrons are said to be delocalised when they are free to move through the structure of a metal and can carry an electrical current.
  • conductor: A conductor is a substance that allows charge or energy to flow through it easily due to the presence of delocalised electrons.
  • forces of attraction: A force of attraction refers to the strength of the pull between two objects either due to their mass, their charge or the presence of magnetic poles.

Common Mistakes To Avoid

  • A metal is an individual atom. The property of a metal atom is the same as the bulk material. Pupils get confused between the attractive forces in the metal atoms and the metallic bond.

3 Quick Questions (With Answers)

1. Explain the scientific idea in this lesson using two key points.

Metals are good electrical conductors and good thermal conductors. Metals can be stretched into wires, or bent/hammered into different shapes.

2. Define this scientific word and use it in context. 'malleable'

A malleable substance can be hammered or pressed into shape without breaking. Include the word in a full scientific explanation, not as a single label.

3. Correct this common scientific misunderstanding.

Mistake: A metal is an individual atom. The property of a metal atom is the same as the bulk material. Pupils get confused between the attractive forces in the metal atoms and the metallic bond. Correction: Reinforce the idea that atoms are tiny and not visible to the naked eye. The material we know as metal is many millions of atoms joined together. Revisit the structure of the atoms before introducing the idea of metallic bonding and giant structure.

More Lessons In This Unit

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