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Explain how positive ions, called cations, and negative ions, known as anions, are formed.

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Cambridge IGCSE Combined ScienceAtoms, elements and compoundsCore content

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Explain how positive ions, called cations, and negative ions, known as anions, are formed

  • This point belongs to Ions and ionic bonds, especially Ions and ionic bonds outcomes.
  • You need to be able to explain how positive ions, called cations, and negative ions, known as anions, are formed.
  • The key ideas to know are Describe.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

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Describe

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Paper 3 structured question: Ions and ionic bonds

Paper 3Theory (Core)2 marks

Description

Formation of Ions

Ions are formed when atoms lose or gain electrons. Cations are positively charged ions, while anions are negatively charged ions.

  1. a

    Explain how cations and anions are formed.

    Aim for approximately 2 distinct marking points.

    [2]
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