Pearson Edexcel International GCSE Science Single Award 16: Physics: Radioactivity and particles
Study guide
Pearson Edexcel International GCSE Science Single Award 4SS0 notes on physics: radioactivity and particles.
Topic 7 covers nuclear notation, ionising radiation, half-life, risk, fission and stellar fusion. These notes follow Pearson 4SS0 Issue 4. Detector circuitry, decay equations, chain-reaction control, reactor energy transfers and fusion conditions belong to broader routes and are excluded.
Nuclei and isotopes
An atom contains protons and neutrons in a nucleus with electrons outside. The nuclide notation:
uses atomic number for protons and mass number for protons plus neutrons. Neutron number is
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