Group 7 (halogens)
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Waxaan qeexi karaa qaabka falcelinta kuwa aan bir ahayn ee kooxda 7, oo waxaan magacaabi karaa alaabta ka soo baxda falcelinta biraha iyo halogens.
Introduction
In this lesson: I can describe the pattern in reactivity of Group 7 non-metals and name the products of reactions between metals and halogens. The elements in Group 7 are all non-metals that have coloured vapours, most of which are toxic. The state of the elements at room temperature changes from gas to solid, down Group 7.
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Quizzes
1. Which of the following statements correctly describes a salt?
- A substance that turns blue litmus paper red.
- Correct answer:A substance that forms when a metal reacts with a non–metal.
- A substance with a pH greater than 7.
- A substance that does not dissolve in water.
- A substance that is always acidic.
2. A substance with a pH of 12 is considered to be ...
- acidic.
- Correct answer:alkaline.
- neutral.
- sour.
3. Which of the following describes a physical change?
- rusting of iron
- Correct answer:melting of ice
- burning of wood
- baking a cake
1. Which of the following elements is a halogen?
- sodium
- Correct answer:chlorine
- magnesium
- carbon
- oxygen
2. What happens to the reactivity of the halogens as you go down Group 7?
- increases
- Correct answer:decreases
- stays the same
- fluctuates
3. The state of iodine at room temperature is ...
- Correct answer:solid.
- liquid.
- gas.
4. Which of the following are products of the reaction between a Group 1 metal and a halogen?
- metal hydroxide
- Correct answer:metal halide
- hydrogen gas
- water
What pupils see
The same lesson as a pupil sees it. You can set any section as work on its own.
- IntroductionPrepare
- Starter quizActivate · 3 questions
- Lesson videoLearn
- Exit quizCheck · 4 questions