In the 1890s a British scientist J.J Thompson discovered electron scientifically.
The gold foil experiment was designed by Rutherford.
In his experiment, the ααα particles were made to come down on a thin gold foil.
Alpha particles ααα are made up of two protons and two neutrons tightly bound together which is identical to Helium-4.
Many of the ααα particles passed linearly through the gold foil.
Some of the particles deviated at small angles.
One out of every 12000 particles appeared to bounce.
With the use of radioactive source they will light it on a golden foil , with shows the presence of atom
The golden foil is around the detector of particles