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Bonding, Structure, and Properties of Matter
Introduction
Understanding how atoms bond and how these bonds affect material properties is a crucial part of GCSE Chemistry. This topic explains why materials behave as they do and how they’re used in everyday life.
This article will cover:
- Types of bonding: ionic, covalent, and metallic.
- Properties of different types of substances.
- Applications in real life.
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Types of Bonding
Ionic Bonding
- Between metals and non-metals.
- How it works: Transfer of electrons creates charged ions that attract each other.
- Examples: Sodium chloride (NaCl), magnesium oxide (MgO).
Covalent Bonding
- Between non-metals.
- How it works: Sharing of electron pairs.
- Examples: Water (Hâ‚‚O), carbon dioxide (COâ‚‚).
Metallic Bonding
- Between metal atoms.
- How it works: Delocalised electrons move freely, creating strong metallic bonds.
- Examples: Iron, copper.
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Properties of Different Substances
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Ionic Compounds:
- High melting and boiling points.
- Conduct electricity when molten or dissolved.
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Covalent Substances:
- Simple molecules: Low melting and boiling points.
- Giant covalent structures: High melting points, e.g., diamond.
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Metals:
- Conduct heat and electricity.
- Malleable and ductile.
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Conclusion
Understanding bonding and structure explains the properties of materials and their real-world applications. Practise identifying bonding types and predicting material behaviours for exam success.
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