GCSE Chemistry - Formation of Ions - Electrons | Charge | Equations

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*** WHAT'S COVERED ***
1. The formation of ions
* An ion is a charged particle formed when an atom gains or loses electrons.
* Atoms form ions to achieve a full outer shell, which makes them more stable.
2. The periodic table and ion formation
* The group number of an element indicates the number of electrons in its outer shell.
* Elements in Groups 1, 2, 6, and 7 are most likely to form ions as this requires less energy.
* Elements in Groups 3, 4, and 5 rarely form ions due to the large amount of energy required.
3. How different groups form ions
* Group 1 elements lose one electron to form 1+ ions.
* Group 2 elements lose two electrons to form 2+ ions.
* Group 6 elements gain two electrons to form 2- ions.
* Group 7 elements gain one electron to form 1- ions.
4. Writing equations for the formation of ions
* How to write equations for atoms losing electrons (e.g., sodium and magnesium).
* How to write equations for atoms gaining electrons (e.g., chlorine and oxygen).

*** CHAPTERS ***
0:00 Introduction
0:42 The Periodic Table and Outer Electrons
1:23 Forming Positive Ions (Groups 1 & 2)
1:45 Forming Negative Ions (Groups 6 & 7)
2:13 Writing Equations for Ion Formation
2:54 Equations for Multiple Electron Transfers

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