ConceptConceptDocsDocuments

CAIE A-Level Chemistry 1.3.9 Free Radicals

Practise identifying free radicals from electron arrangements and distinguishing unpaired electrons from lone pairs.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • define a free radical as a species containing one or more unpaired electrons
  • use a dot, orbital diagram or total valence-electron count to locate an unpaired electron
  • distinguish a radical electron from a lone pair, which contains two paired electrons

1.3.9—Free radical as a species with one or more question 1

[Maximum number: 1]

Chlorine is one of the elements in Group 17 of the Periodic Table.

The halogenoalkane CH3CH2Cl\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Cl} forms when chlorine reacts with C2H6\mathrm{C}_{2} \mathrm{H}_{6} via a free-radical substitution mechanism.

Define free radical.

All question bank results loaded