Complex sentence: The objective of this project was to find a means of separating the fissile uranium-235 isotope in natural uranium; she researched the chemical and thermodynamic properties of uranium hexafluoride and investigated the possibility of separating isotopes by photochemical reactions.
Split into simpler sentences: The objective of this project was to find a means of separating the fissile uranium-235 isotope in natural uranium. She researched the chemical and thermodynamic properties of uranium hexafluoride and on the theory of separating isotopes by photochemical reactions.