Predicting ionic charges by counting electrons to reach a stable octet
In short: Learn how atoms achieve stability by gaining or losing electrons. This video explains the octet rule, showing how elements shift their electron counts to form ions, which is the foundational logic for understanding how ionic compounds are built.
Atoms generally strive to reach a full octet, which is the most stable configuration for their valence shell. To achieve this, elements will gain or lose the minimum number of electrons required to complete their outer shell.
For instance, fluorine possesses seven valence electrons. By gaining a single electron, it completes its octet and forms an ion with a 1- charge. This predictable behavior allows chemists to determine the charges of ions within various ionic compounds.
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Sources
- Summary by Intellect · source: Valence electrons and ionic compounds | AP Chemistry | Khan Academy
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