Chemistry A-Level
bond breaking and bond formation
What bond breaking and bond formation means in Chemistry A-Level, as defined for OCR.
Definition of bond breaking and bond formation
Check what you remember
Read the wording for your board, then hide it and explain bond breaking and bond formation in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Breaking bonds always requires energy input, while forming new σ-bonds releases energy, and the overall change is exothermic when the energy released exceeds the energy needed.
Topics that use bond breaking and bond formation
- Alkenes (OCR A-Level)
Related terms
- Addition polymerisation
- Addition polymerisation of alkenes
- Addition reactions forming other organic chemicals
- Atomic number and first point of difference
- Biodegradable and renewable alternatives
- Biodegradable polymers
- Bromine water test for unsaturation
- Cahn–Ingold–Prelog priority rules
Using bond breaking and bond formation 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 Chemistry questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Chemistry A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge