Combined Science GCSE
Distribution of mass within the atom
What Distribution of mass within the atom means in Combined Science GCSE, as defined for AQA.
Definition of Distribution of mass within the atom
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Reference: AQA
Most of the mass of an atom is concentrated in the nucleus, because protons and neutrons each have a relative mass of 1 while electrons have a relative mass of about 1/1836, which is negligible.
Topics that use Distribution of mass within the atom
- The structure of an atom (AQA GCSE)
Related terms
- Absorption of electromagnetic radiation
- Charge and neutrality
- Emission of electromagnetic radiation
- Energy levels
- Evidence from alpha-particle scattering
- Flame colours
- Structure of the atom
- Subatomic particle properties
Using Distribution of mass within the atom in the exam
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