The Story of Atomic Energy

Action active already appear artificial atomic weight B-rays become called cause century charge chemical chemistry combination completely compounds constant containing cosmical rays course direction discovered discovery disintegration effect electric electrons elements established exist experimental field fission gases give given Group heat helium hydrogen important increase ionisation ions isotopes kinetic energy known later lead less light lines mass matter means measure metals methods mineral molecules motion natural negative neutrons nuclear nucleus orbit ordinary original oxygen particles Periodic photographic physical positive possible practically present proton proved pure quantity quantum radiation radioactive radium radon range rays regarded relatively respectively result Rutherford seems separate shows similar simple single spectra spectrum successive Table taken termed theory thorium tion transmutation tube unit University uranium wavelength whole X-rays