HESI A2 Exam Prep 2026

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Practice with exam-accurate HESI A2 questions that match the real test in format, difficulty, and logic. Trusted by students accepted into nursing programs across the United States.

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About Atomic Structure

Learn the key differences between protons, neutrons, and electrons in HESI A2 Chemistry. Discover why electrons have significantly less mass than protons.

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Atomic Structure HESI A2 Practice Questions

Free Atomic Structure practice questions for the HESI A2 exam with detailed rationales.

Question 2 of 2

Which of the following statements is true regarding subatomic particles?
Protons and neutrons have equal charges.
Electrons have significantly less mass than protons.
The number of neutrons determines an element’s identity.
Neutrons and electrons are inside the nucleus.

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