Chemistry A-Level
Atomic Number (Z)
What Atomic Number (Z) means in Chemistry A-Level, as defined for AQA.
Definition of Atomic Number (Z)
Check what you remember
Read the wording for your board, then hide it and explain Atomic Number (Z) in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
The number of protons in the nucleus of an atom.
Topics that use Atomic Number (Z)
- Fundamental particles (AQA A-Level)
Related terms
- electrostatic attraction
- First ionisation energy
- nuclear atom
- Orbital
- relative mass
- shells and energy levels
- discovery of the neutron
- electrical neutrality
Using Atomic Number (Z) 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