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CAIE A-Level Chemistry 3.1.3 Periodic Electronegativity Trends

Practise explaining the increase across a period and decrease down a group using attraction for bonding electrons.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • explain increasing electronegativity across a period by rising nuclear charge with similar shielding
  • explain decreasing electronegativity down a group by increased radius and shielding
  • use the trend to compare bond polarity or ionic versus covalent character without relying only on position

3.1.3—The trends in electronegativity across question 1

[Maximum number: 1]

Which diagram shows the electronegativity of the elements Na,Mg,Al\mathrm{Na}, \mathrm{Mg}, \mathrm{Al} and Si plotted against

their first ionisation energies?

A
A

A

B
B

B

C
C

C

D
D

D

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