CAIE A-Level Chemistry 9.2.2 Period 3 Oxidation Number Trends
Practise stating oxidation numbers in specified Period 3 oxides and chlorides and relating maxima to valence electrons.
- Syllabus
- 2028–2030
- Course
- Chemistry 9701
- Level
- AS
Exam points
- calculate the Period 3 element’s oxidation number from each specified oxide or chloride formula
- describe the rise in maximum oxidation number from +1 to +6 across the listed compounds
- explain the maximum using the increasing number of outer-shell electrons available for bonding
9.2.2—The variation in the oxidation number question 1
[Maximum number: 2]
Oxygen is a Group 16 element.
The maximum oxidation state of the Period 3 elements in their oxides varies across the period.
State and explain the variation.
it increases
as number of valence electrons (which can be used in bonding / lost / shared / donated) increases
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