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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Ions and ionic bonds

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Ions and ionic bonds

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Paper 3Theory (Core)4 marks

Formation of ionic bonds.

Description

Ionic Bonding Process

Describe the process of ionic bonding between a Group I metal and a Group VII non-metal, including the role of electron transfer.

  1. a

    Describe the process of ionic bonding between a Group I metal and a Group VII non-metal.

    Aim for approximately 4 distinct marking points.

    [4]

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Paper 3 structured question: Ions and ionic bonds

Paper 3Theory (Core)3 marks

Description

Ionic Bonding

Sodium (Na) from Group I loses one electron to become Na⁺, while chlorine (Cl) from Group VII gains that electron to become Cl⁻. The resulting Na⁺ and Cl⁻ ions attract each other, forming sodium chloride (NaCl).

  1. a

    Explain how ionic bonds are formed between sodium and chlorine using a dot-and-cross diagram.

    Aim for approximately 3 distinct marking points.

    [3]