Group 7 (halogens) - Chlorine, Bromine And Iodine
Overview
Chlorine disinfects swimming pools, bromine was once used in photographic film, and iodine is dabbed onto cuts as an antiseptic. These elements belong to Group 7 of the Periodic Table - the halogens - a family of reactive non-metals whose properties follow striking patterns.
In this lesson you will learn the colours and physical states of chlorine, bromine, and iodine, explore the trends in their physical and chemical properties, and use those trends to predict the behaviour of halogens you have never encountered.
Objectives
- Know the colours, physical states (at room temperature) and trends in physical properties of these elements
- Use knowledge of trends in Group 7 to predict the properties of other halogens
Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Group 7 (halogens) - Chlorine, Bromine And Iodine. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- Going down Group 7, the reactivity of the halogens: A) Increases B) Decreases C) Stays the same D) First increases then decreases Answer: B
- Which halogen is a liquid at room temperature? A) Fluorine B) Chlorine C) Bromine D) Iodine Answer: C
- Chlorine can displace bromine from potassium bromide because: A) Chlorine is less reactive B) Chlorine is more reactive C) Bromine is a gas D) Chlorine is a solid Answer: B
- Going down Group 7, the melting points: A) Decrease B) Increase C) Stay the same D) Fluctuate Answer: B
- How many electrons do halogens have in their outer shell? A) 1 B) 2 C) 7 D) 8 Answer: C
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Practice Mock Questions
Want to practice mock questions on Group 7 (halogens) - Chlorine, Bromine And Iodine? Download the Green Bridge CBT app to access mock questions and full practice assessments for this topic.
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