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2.1.2 Structure of the atom and subatomic particles
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Inside the atom

Inside the atom

Atom with a central nucleus containing protons and neutrons, surrounded by electrons in shells

An atom has a tiny, dense nucleus at its centre. The nucleus contains protons and neutrons, while electrons occupy shells around the nucleus.

2.1.2 Structure of the atom and subatomic particles Lesson

  1. GCSE
  2. /Chemistry
  3. /2.1.2 Structure of the atom and subatomic particles

Step-by-step lessons on Edexcel GCSE Chemistry 2.1.2 Structure of the atom and subatomic particles. Each one builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.

Lessons