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Explain how ionic bonds are formed between elements from Group I and Group VII, using dot-and-cross diagrams to illustrate.

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Cambridge IGCSE Combined ScienceAtoms, elements and compoundsCore content

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Explain how ionic bonds are formed between elements from Group I and Group VII, using dot-and-cross diagrams to illustrate

This point belongs to Ions and ionic bonds, especially Ions and ionic bonds outcomes.
You need to be able to explain how ionic bonds are formed between elements from Group I and Group VII, using dot-and-cross diagrams to illustrate.
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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).

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

Explain how positive ions, called cations, and negative ions, known as anions, are formed.
Ions and ionic bonds outcomes
Identify that an ionic bond is a strong attraction due to electrostatic forces between ions with opposite charges.
Ions and ionic bonds outcomes
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.
Ions and ionic bonds outcomes
Explain how ionic bonds are created between metallic and non-metallic ions, including the use of dot-and-cross diagrams for representation.
Ions and ionic bonds outcomes
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.
Ions and ionic bonds outcomes

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