# Atomic structure and isotopes

> This section is the atom as the basic building block of matter: how models of the atom developed, what sits in the nucleus, how atomic number and mass number work, and what isotopes are. Stay with…

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## Full notes

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## More in The atom

- [Electron configuration](https://www.hlayiso.com/grade-10/physical-sciences/notes/the-atom/electron-configuration) — Next section
- [All The atom sections](https://www.hlayiso.com/grade-10/physical-sciences/notes/the-atom)

## Frequently asked questions

### What will I learn in "Atomic structure and isotopes"?

This section covers Atomic structure and isotopes as part of The atom in Grade 10 Physical Sciences. You'll find clear explanations, worked examples, and key definitions aligned to the CAPS curriculum.

### Is this section aligned with the CAPS curriculum?

Yes. All notes on Hlayiso, including "Atomic structure and isotopes", are written against the official CAPS curriculum and ATP for Grade 10 Physical Sciences.

### What should I study after "Atomic structure and isotopes"?

Continue with the next section in The atom, or test your understanding with the interactive quiz linked to this section.

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