Properties of Group 7
I can describe patterns in the properties of group 7 elements and explain how these are determined by their electron structures.
Properties of Group 7
I can describe patterns in the properties of group 7 elements and explain how these are determined by their electron structures.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- Group 7 elements are very reactive and their reactivity decreases down the group.
- Moving down Group 7 elements, atomic mass, density, and melting and boiling points increase.
- In chemical reactions, atoms of Group 7 elements gain one outer electron making just full electron shells.
- Going down Group 7, the force attracting an extra electron reduces with the distance of each shell from the nucleus.
- Halogens are elements, halides are salts.
Keywords
Salts - are ionic compounds formed from positive and negative ions electrostatically attracted to each other.
Halogens - are reactive non-metallic elements in Group 7 of the periodic table which react with metals to form salts.
Halides - are the name of salts formed from halogens, e.g sodium chloride (NaCl).
Diatomic - element consists of two atoms of the same type, chemically bonded together.
Common misconception
Pupils often forget that the halogens are diatomic molecules.
Explanation of the bonding to form molecules helps to explain why they exist as diatomic molecules.
To help you plan your year 11 chemistry lesson on: Properties of Group 7, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 11 chemistry lesson on: Properties of Group 7, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 4 chemistry lessons from the Groups of the periodic table unit, dive into the full secondary chemistry curriculum, or learn more about lesson planning.
Equipment
None required.
Licence
Lesson video
Loading...
Starter quiz
6 Questions
F
Cl
I
At
Br
Exit quiz
6 Questions
added to toothpaste to prevent tooth decay
added to tap water to kill harmful microbes present
as an antiseptic to treat wounds
-219.6°C
-101.5°C
-7.3°C
113.7°C
302.0°C