IB Chemistry SL Reactivity 3.3.1 Radicals

Practise recognising radicals as molecular entities with an unpaired electron and representing that electron with a dot. Use the notation to distinguish a radical from an ion or…

Syllabus
First assessment 2025
Objective
3.3.1
Level
SL

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: 1]

Antioxidants are a type of food additive.

Antioxidants such as BHT and 3-BHA prevent the unwanted reactions of free radicals. State what a free radical is.

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