Physics GCSE
protons and electrons
What protons and electrons means in Physics GCSE, as defined for AQA.
Definition of protons and electrons
Check what you remember
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Reference: AQA
In an atom the number of electrons is equal to the number of protons in the nucleus.
Topics that use protons and electrons
- Mass number, atomic number and isotopes (AQA GCSE)
Related terms
- atomic number
- counting neutrons
- identity, charge and mass
- ions
- isotopes
- mass number
- neutral atoms
- nuclide notation
Using protons and electrons in the exam
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