ZIMSEC O-Level Chemistry
Group trends (Groups II and VII)
Group trends (Groups II and VII) in ZIMSEC O-Level Chemistry: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic40 practice questions2 lessons
Overview
Form 3 (competency matrix 8.11.3).
Learning objectives
What the syllabus expects you to be able to do.
- 7.2.1.3Describe the relationship between group number and the number of valence electrons.
- 7.2.1.4Describe the reactions of magnesium, calcium and barium with oxygen and with water.
- 7.2.1.5Describe the trends in the physical properties (colour, physical state and volatility) and the chemical properties of the Group VII elements.
Lessons
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Group II: magnesium, calcium and barium
25 min
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Group VII: the halogens
30 min
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Sample question
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Turn Group trends (Groups II and VII) into a strength.
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