CAIE A-Level Chemistry 9.2.6 Bonding and Electronegativity Trends
Practise explaining Period 3 oxide and chloride trends through bonding changes, valence electrons and electronegativity.
- Syllabus
- 2028–2030
- Course
- Chemistry 9701
- Level
- AS
Exam points
- link increasing maximum oxidation number to the growing number of valence electrons across the period
- relate high melting points to giant ionic or covalent lattices and low values to molecular substances
- explain the shift from basic ionic oxides to acidic covalent oxides as electronegativity increases
9.2.6—Variations and trends in 9.2.2, 9.2.3, 9.2.4 question 1
[Maximum number: 1]
Three statements about the chemical periodicity of Period 3 oxides are listed.
1 The maximum oxidation state of the Period 3 elements in their oxides increases from sodium to phosphorus, then decreases from phosphorus to sulfur.
2 The oxides from sodium to aluminium dissolve in water without hydrolysis; from silicon to sulfur they are hydrolysed by water.
3 The structure and bonding changes from giant ionic to giant covalent to simple molecular.
Which statements are correct?
A
1, 2 and 3
B
1 only
C
2 and 3 only
D
3 only
D
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