Main content

# Unit 1: Atomic structure and properties

800 possible mastery points

Mastered

Proficient

Familiar

Attempted

Not started

Quiz

Unit test

## About this unit

This unit explores the atomic theory of matter, the foundational premise of chemistry. Learn about moles and molar mass, mass spectrometry, electron configurations, periodic trends, and more. Practice what you’ve learned and study for the AP Chemistry exam with more than 100 AP-aligned questions.### Learn

### Practice

- Elemental composition of pure substancesGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 320 Mastery points

### Learn

### Practice

- Atomic structure and electron configurationGet 3 of 4 questions to level up!

### Learn

### Practice

- Periodic trendsGet 5 of 7 questions to level up!

### Learn

### Practice

- Photoelectron spectroscopyGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 320 Mastery points

Up next for you:

Level up on all the skills in this unit and collect up to 800 Mastery points!#### Unit test

AP® is a registered trademark of the College Board, which has not reviewed this resource.