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