Performer of the gold foil experiment 1871-1937
The Gold Foil Experiment
Testing Thompson's idea of the "plum-pudding model," Rutherford got a sheet of gold foil, which was about eight atoms thick, and got a sample of radioactive radium. The radium began to decompose to release two neutrons and two protons, which were particles made to pass through the gold foil. Since particles passed through undisturbed this meant that the atoms were composed of empty space, but every once in a while the alpha particle would deflect.
-positive alpha particles