GCSE Chemistry - Electronic Structure

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*** WHAT'S COVERED ***
1. The concept of electron shells and electron arrangement in atoms.
* The link between full outer shells and atomic stability.
* How incomplete outer shells lead to an atom's reactivity.
2. Rules for distributing electrons into shells.
* Capacity of the first, second, and third electron shells for the first 20 elements.
* Order of filling shells based on energy levels.
3. Methods of representing electron configurations.
* Electron shell diagrams using dots or crosses.
* Numerical notation (e.g., 2.8.1 for Sodium).
4. Determining electron arrangements for specific neutral atoms.
* Sodium (Na)
* Argon (Ar)
* Calcium (Ca)
* Fluorine (F)
5. Formation and electron arrangement of ions.
* How atoms gain or lose electrons to form ions and achieve a stable electron configuration.
* Examples of ion formation: Calcium ion and Fluoride ion.
* Electron structures of these ions.
6. The stable electron configuration of Noble Gases.
* Why Noble Gases (Group 0) are unreactive, with Neon (Ne) as an example.

*** CHAPTERS ***
0:00 Introduction
0:20 Atomic Stability and Outer Electron Shells
1:03 Rules for Filling Electron Shells
2:14 How Atoms React to Achieve Stability
2:29 Exception with Noble Gases
3:33 Numerical Notation for Electron Structures
3:50 Examples of Drawing Electron Diagrams

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