What's on the AP Chemistry Unit 1 practice test
The standard version takes about 60 minutes and follows the timing and directions of the AP exam, sized to one unit:
- 20 Multiple Choice Questions (30 minutes)
- 1 FRQ – FRQ 1 – Long Answer (15 minutes)
- 1 FRQ – FRQ 4 – Short Answer (15 minutes)
Questions are drawn from 2005 multiple-choice questions and 55 FRQs written for Unit 1, Atomic Structure & Properties.
Sample AP Chemistry Unit 1 question
A particulate model of a binary mixture shows 10 atoms of Element X (atomic mass 20 amu) and 10 atoms of Element Y (atomic mass 80 amu) distributed uniformly. What is the mass percent of Element X in this mixture?
20%
25%
50%
80%
Explanation
Calculating mass percent requires determining the total mass of each component. With 10 atoms of X (10 × 20 = 200 amu) and 10 atoms of Y (10 × 80 = 800 amu), the total mass is 1000 amu. The mass percent of X is (200/1000) × 100 = 20%.
Practice AP Chemistry Unit 1 FRQs
Answer the unit's free-response questions one at a time and get a score on every part.
- FRQ 1 – Long Answer (6 questions)
- FRQ 2 – Long Answer (5 questions)
- FRQ 3 – Long Answer (3 questions)
- FRQ 4 – Short Answer (11 questions)
- FRQ 5 – Short Answer (9 questions)
- FRQ 6 – Short Answer (9 questions)
- FRQ 7 – Short Answer (12 questions)
Review Unit 1 before you start
- 1.1 Moles and Molar Mass
- 1.2 Mass Spectra of Elements
- 1.3 Elemental Composition of Pure Substances
- 1.4 Composition of Mixtures
- 1.5 Atomic Structure and Electron Configuration
- 1.6 Photoelectron Spectroscopy
- 1.7 Periodic Trends
- 1.8 Valence Electrons and Ionic Compounds