Unit 1 · Structure 1: Models of the particulate nature of matter · Topic 1.2

IB Chemistry — The nuclear atom

Topic 1.2 of IB Chemistry covers The nuclear atom, which is part of Unit 1: Structure 1: Models of the particulate nature of matter. Students explore key concepts including Subatomic particles and the nuclear atom, Isotopes, Relative atomic mass and the mass spectrometer. A strong understanding of the nuclear atom is essential for IB Chemistry exams and builds the foundation for connected topics across the syllabus.

Exam technique guide Practice questions

What you'll learn in Topic 1.2

1.2.1 Subatomic particles and the nuclear atom
1.2.2 Isotopes
1.2.3 Relative atomic mass and the mass spectrometer

Suggested study order: Read the notes for each sub-topic below → test yourself with flashcards → attempt practice questions → review exam technique.

Study resources — 1.2 The nuclear atom

1.2.1

Subatomic particles and the nuclear atom

Notes

1.2.2

Isotopes

Notes

1.2.3

Relative atomic mass and the mass spectrometer

Notes

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Topic 1.2 The nuclear atom forms a core part of Unit 1: Structure 1: Models of the particulate nature of matter in IB Chemistry. Mastering these concepts will strengthen your understanding of connected topics across the syllabus and prepare you for exam questions that require analysis, evaluation, and real-world application.

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