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Ions and ionic bonds
Explain how positive ions, called cations, and negative ions, known as anions, are formed.
6
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60
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42
Questions
90 min
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CambridgeIGCSECombined ScienceAtoms, elements and compounds
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Ions and ionic bonds outcomes6 objectives
- Explain how positive ions, called cations, and negative ions, known as anions, are formed.
- Identify that an ionic bond is a strong attraction due to electrostatic forces between ions with opposite charges.
- Explain how ionic bonds are formed between elements from Group I and Group VII, using dot-and-cross diagrams to illustrate.
- Outline the characteristics of ionic compounds, including: (a) their high melting and boiling points, (b) their ability to conduct electricity when dissolved in water or melted, but not when solid, and (c) their general solubility in water.
- Explain how ionic bonds are created between metallic and non-metallic ions, including the use of dot-and-cross diagrams for representation.
- Describe the giant lattice structure of ionic compounds, which consists of a regular pattern of alternating positive and negative ions, using sodium chloride as an example.
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