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Learning objective

Explain that the Group VII halogens, which include chlorine, bromine, and iodine, are diatomic non-metals and identify the general trends observed as you move down the group, specifically: (a) an increase in density (b) a decrease in reactivity

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE ChemistryThe Periodic TableCore content

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Quick explanation

Explain that the Group VII halogens, which include chlorine, bromine, and iodine, are diatomic non-metals and identify the general trends observed as you move down the group, specifically: (a) an increase in density (b) a decrease in reactivity

  • This point belongs to Group VII properties, especially Group VII properties outcomes.
  • You need to be able to explain that the Group VII halogens, which include chlorine, bromine, and iodine, are diatomic non-metals and identify the general trends observed as you move down the group, specifically: (a) an increase in density (b) a decrease in reactivity.
  • The key ideas to know are Describe and Identify.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DescribeIdentify

Why it matters

This objective helps connect Group VII properties outcomes to exam-style questions, flashcards, and revision notes for Group VII properties.

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Paper 3 structured question: Group VII properties

Paper 3Theory (Core)1 marks

Description

Trends in Group VII Halogens

As you move down Group VII, the halogens show an increase in density and a decrease in reactivity.

  1. a

    State the trend in density as you move down Group VII.

    Aim for approximately 1 distinct marking point.

    [1]
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