This memory aid covers Memory Aid: CEO within Rates & Collision Theory for GCSE Chemistry. Revise Rates & Collision Theory in Rates of Reaction for GCSE Chemistry with 20 exam-style questions and 16 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 10 of 13 in this topic. Use it for quick recall, then test yourself straight afterwards so the memory aid becomes usable in an answer.
Topic position
Section 10 of 13
Practice
20 questions
Recall
16 flashcards
🧠 Memory Aid: CEO
To remember the conditions for a successful collision, think of the letters CEO:
- C — COLLIDE (particles must physically meet)
- E — ENERGY ≥ Ea (must exceed activation energy)
- O — ORIENTATION (must hit at the right angle)
A CEO runs a company — all three must be present for the company (reaction) to succeed. If any one is missing, nothing happens!