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Inside an atom

Inside an atom

Labelled atom showing nucleus, protons, neutrons, electron shells and isotope notation

An atom has a tiny central nucleus made of protons and neutrons, with electrons in shells around it. The nucleus is positive overall, while electrons are negatively charged.

Atomic structure and ionising radiation Lesson

  1. GCSE
  2. /Physics
  3. /Atomic structure and ionising radiation

Step-by-step lessons covering Edexcel GCSE Physics Atomic structure and ionising radiation for Foundation and Higher tier. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Master the required practical work and core equations early, since both papers can draw on content and maths skills from across the whole specification.

Lessons