GRE Subject 2026 Practice Test Physics Atomic Physics Free Quiz 2

11. What principle states that no two electrons can have the same quantum numbers?

A. Aufbau principle B. Pauli exclusion principle C. Hund's rule D. Octet rule

12. What rule states that electrons fill degenerate orbitals singly before pairing?

A. Hund's rule B. Aufbau principle C. Pauli exclusion principle D. Octet rule

13. What is the set of wavelengths emitted or absorbed by atoms?

A. Molecular spectrum B. X-ray spectrum C. Atomic spectrum D. Gamma spectrum

14. Which series corresponds to transitions to n = 1?

A. Lyman B. Balmer C. Paschen D. Brackett

15. Which series corresponds to transitions to n = 2?

A. Lyman B. Paschen C. Balmer D. Brackett

16. Which series corresponds to transitions to n = 3?

A. Lyman B. Balmer C. Brackett D. Paschen

17. What is the energy required to remove an electron from an atom?

A. Excitation energy B. Ionization energy C. Binding energy D. Dissociation energy

18. What determine which transitions are allowed in atomic spectra?

A. Quantum numbers B. Energy levels C. Selection rules D. Wave functions

19. What is the splitting of spectral lines in a magnetic field?

A. Stark effect B. Paschen-Back effect C. Doppler effect D. Zeeman effect

20. What is a small difference in energy levels in hydrogen?

A. Lamb shift B. Zeeman effect C. Stark effect D. Fine structure