Chemistry GCSE
Mass number calculation
What Mass number calculation means in Chemistry GCSE, as defined for AQA.
Definition of Mass number calculation
Check what you remember
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Reference: AQA
The sum of the protons and neutrons in an atom is its mass number.
Topics that use Mass number calculation
- 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
- Nanometres as a unit of length
- Nucleus as the mass centre
- Scale and size of atoms
Using Mass number calculation in the exam
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