Key term for Edexcel GCSE Physics, used in Atomic Structure.
A numerical comparison of the mass of a subatomic particle to another, used instead of absolute mass units like kilograms.
Relative mass appears in Edexcel GCSE Physics revision content for Radioactivity, especially Atomic Structure and Relative Masses and Charges.
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Electricity and circuits
Circuits, Potential Difference and Charge • Atomic Structure
