Memory The atom & periodic table Version en ligne Match the pairs! par Nikita Fitzpatrick A image taken in the same region of light as the Paschen series This experiment helped to discover the mass to charge of an electron Thomson used this device to determine that cathode rays have a - charge George Stoney gave this a name..... William Crookes used this to help to discover cathode rays Put forward a theory for the atom based on the element hydrogen The spectrum gained when light is emitted through electron movement down levels The spectrum gained when light is absorbed