HESI A2 Exam Prep 2026

Real HESI A2 Questions.
Real Accuracy. Real Results.

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.

8
Exam Sections
75%
Typical Pass Score
~5hr
Total Test Time
95%
Our Pass Rate

About Nuclear Chemistry & Radioactivity

Beta decay increases an atom’s atomic number by converting a neutron into a proton, producing a new element with one more proton.

Back to topics

Nuclear Chemistry & Radioactivity HESI A2 Practice Questions

Free Nuclear Chemistry & Radioactivity practice questions for the HESI A2 exam with detailed rationales.

Question 1 of 2

Which type of radioactive decay results in an increase in atomic number?
Beta decay
Gamma decay
Positron emission
Alpha decay