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Electron Shells and Energy

Electron Shells and Energy

Diagram of four electron shells with energy increasing away from the nucleus, plus a sodium atom containing 2, 8, and 1 electrons

An electron shell is a region around the nucleus occupied by electrons with a particular energy. Shells are also called energy levels because every shell corresponds to a set electron energy.

1.1.7 Electronic structure Lesson

  1. GCSE
  2. /Chemistry
  3. /1.1.7 Electronic structure

Step-by-step lessons covering AQA GCSE Chemistry 1.1.7 Electronic structure for Foundation and Higher tier. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.

Lessons