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IB Chemistry HL 3.3.1 Radicals Question Bank

Practise IB Chemistry HL 3.3.1 with questions recognising radical notation, unpaired electrons and high reactivity.

Syllabus
First assessment 2025
Course
Chemistry HL
Level
HL

Exam points

  • identify the dot in a formula as an unpaired electron rather than an ionic charge
  • distinguish radical species from molecules and ions with similar atom compositions
  • relate the unpaired electron to high reactivity without assuming every fragment is stable

3.3.1—Radicals question 1

[Maximum number: 2]

The Sun's energy is produced by the fusion of hydrogen nuclei.

Nuclear energy produces ionizing radiation which leads to the formation of free radicals.

Explain why free radicals are harmful to living cells.

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