A thin gold foil was placed between the alpha particle source and a screen coated with zinc sulfide, which glows when struck by alpha particles.
Rutherford proposed that atoms are mostly empty space with the mass concentrated in a tiny positively charged nucleus.
The positive charge on the nucleus is balanced by negative electrons orbiting around it at different distances from the nucleus.
Electron shells can be thought of as concentric spheres surrounding the nucleus.
Each electron shell has a specific energy level associated with it.
Name the 3 sub -atomic particles.
Name the scientists who discovered the sub -atomic particles.
What are canal rays?
Positively charged radiations in a gas discharge.
What were the observations made by rutherford in his a-particle scattering experiment?
Most of the fast moving a-particles passed straight to the goldfoil. some of the a-particles were deflected by the foil by small and large angles. surprisingly one out of every 12000 particles appear to rebound.
What is the thickness of the goldfoil?
0.00004cm
Neutrons are present in the nucleus of all atoms ,except hydrogen
