Chemistry › Section B · Atoms, molecules, and ions › Topic B.3
Chemical formulas
A chemical formula packs the make-up of a substance into a few letters and numbers. Learning to read formulas exactly, and to tell an empirical formula from a molecular one, is the groundwork for every calculation in chemistry.
In this topic
- Formulas as chemistry's shorthand
- Reading a formula exactly
- Elements that come as molecules
- Structural formulas and models
- Empirical formulas
- Worked example: finding empirical formulas
- From empirical to molecular formula
- Worked example: finding a molecular formula
- Isomers: same formula, different molecule
- Common mistakes to avoid
- Key takeaways
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