Chemistry GCSE
Nucleus as the mass centre
What Nucleus as the mass centre means in Chemistry GCSE, as defined for AQA.
Definition of Nucleus as the mass centre
Check what you remember
Read the wording for your board, then hide it and explain Nucleus as the mass centre in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
Almost all of the mass of an atom is in the nucleus, which contains protons and neutrons.
Topics that use Nucleus as the mass centre
- Size and mass of atoms (AQA GCSE)
Related terms
- Relative mass of subatomic particles
- Standard form and unit conversion
- Atomic dimensions in metres
- Isotope notation
- Mass number calculation
- Nanometres as a unit of length
- Scale and size of atoms
Using Nucleus as the mass centre 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 GCSE termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge