Transition state
What Transition state means in Combined Science GCSE, as defined for AQA.
Definitions of Transition state
Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.
Check what you remember
Read the wording for your board, then hide it and explain Transition state in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
The highest point on the curve, where bonds in the reactants are being broken and new bonds are forming.
The peak of the curved line, representing the transition state.
Topics that use Transition state
- Reaction profiles (AQA GCSE)
Related terms
Using Transition state in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Combined Science questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
A week of Premium from your first lesson · Then the free plan continues · No card, no charge