Chemistry A-Level
relative mass
What relative mass means in Chemistry A-Level, as defined for AQA.
Definition of relative mass
Check what you remember
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Reference: AQA
A comparison, not a measurement in kilograms, on which the proton and neutron each have 1 and the electron has 1/1840, usually quoted as 0.0005.
Topics that use relative mass
- Fundamental particles (AQA A-Level)
Related terms
- electrostatic attraction
- First ionisation energy
- nuclear atom
- Orbital
- shells and energy levels
- Atomic Number (Z)
- discovery of the neutron
- electrical neutrality
Using relative mass in the exam
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