Chemistry A-Level
carbon-12 scale
What carbon-12 scale means in Chemistry A-Level, as defined for AQA.
Definition of carbon-12 scale
Check what you remember
Read the wording for your board, then hide it and explain carbon-12 scale in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
The scale on which the mass of an atom of carbon-12 is defined as exactly 12.
Topics that use carbon-12 scale
- Relative atomic mass and relative molecular mass (AQA A-Level)
Related terms
- ionic lattices
- Relative atomic mass
- relative formula mass
- relative molecular mass
- water of crystallisation
- dimensionless ratio
- formula units
Using carbon-12 scale 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