Memory The atom & periodic table Versión en línea Match the pairs! por Nikita Fitzpatrick Put forward a theory for the atom based on the element hydrogen 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 William Crookes used this to help to discover cathode rays The spectrum gained when light is absorbed George Stoney gave this a name..... Thomson used this device to determine that cathode rays have a - charge The spectrum gained when light is emitted through electron movement down levels