Looking at atomic mass spectra of uranium and its fission products (and hence the difference in their energy potential) in the early 20th century would have helped you predict just how big a deal nuclear weapons will be, in a way that looking at the rate of improvement of conventional explosives would not have.
Looking at atomic mass spectra of uranium and its fission products (and hence the difference in their energy potential) in the early 20th century would have helped you predict just how big a deal nuclear weapons will be, in a way that looking at the rate of improvement of conventional explosives would not have.