Chemistry › Section B · Atoms, molecules, and ions › Topic B.5
Ionic and molecular compounds
Atoms join in two broad ways: by handing electrons over, which makes ions, or by sharing them, which makes molecules. Telling the two apart, and writing correct formulas for ionic compounds, is a skill you will use in nearly every chemistry topic that follows.
In this topic
- Electrons on the move
- Predicting ion charges
- Naming simple ions
- Polyatomic ions
- Ionic compounds
- Writing ionic formulas
- Worked example: formulas from charges
- Worked example: polyatomic ions
- Molecular compounds
- Common mistakes to avoid
- Key takeaways
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