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CAIE A-Level Chemistry AS 3.1 Electronegativity and Bonding Questions

Practise using electronegativity differences and periodic trends to explain electron transfer, sharing and bond polarity.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • define electronegativity as attraction for bonding electrons in a covalent bond
  • explain Period 3 or Group 16 trends using nuclear charge, radius and shielding
  • use electronegativity differences to compare ionic and covalent bonding in compounds

Covered syllabus points

3.1.1—Electronegativity3.1.2—Factors influencing the electronegativities3.1.3—The trends in electronegativity across3.1.4—The differences in Pauling electronegativity

Question 1

[Maximum number: 3]

The melting points of some solids are shown in Table 1.1.

Table 1.1

Table 1.1

Question (a)

(a)

Define electronegativity.

[ 1 ]

Question (b)

(b)

Explain why electronegativity increases across a period.

[ 2 ]

Question 2

[Maximum number: 1]

Which graph correctly shows relative electronegativity plotted against relative atomic radius for the elements Na, Mg, Al and Si ?

Figure for Question 2 — CAIE A-Level Chemistry AS
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