Atomic StructureTopic Summary
Topic Summary: Electronic Configuration
Part of Electronic Configuration — GCSE Chemistry
This topic summary covers Topic Summary: Electronic Configuration within Electronic Configuration for GCSE Chemistry. Revise Electronic Configuration in Atomic Structure for GCSE Chemistry with 24 exam-style questions and 24 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 12 of 12 in this topic. Use this topic summary to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 12 of 12
Practice
24 questions
Recall
24 flashcards
Topic Summary: Electronic Configuration
Key Terms
- Shell: Energy level where electrons are found
- Configuration: Arrangement written as e.g. 2,8,1
- Outer shell electrons: Determine chemical properties
- Group: = number of outer electrons
- Period: = number of occupied shells
Must-Know Facts
- Shell capacities: 1st = 2, 2nd = 8, 3rd = 8
- Electrons fill lowest energy shell first
- Same group = same outer electrons = similar properties
- Full outer shell = stable = unreactive (Group 0)
- Group 1: 1 outer electron, very reactive
- Group 7: 7 outer electrons, very reactive