This document lists the names of several scientists who made important contributions to the field of atomic physics including J.J. Thomson who discovered the electron, Eugen Goldstein and Ernest Rutherford who conducted experiments on cathode rays and radiation, James Chadwick who discovered the neutron, Niels Bohr who made contributions to atomic structure, and Max Plank who proposed quantum theory.

13. J.J. THOMSON

14. EUGEN
GOLDSTEIN

15. ERNEST
RUTHERFORD

20. JAMES
CHADWICK

22. NIELS BOHR

24. MAX PLANK