When α-particles are sent through a thin metal foil, most of them go straight through the foil. What inference do you draw from it?
Do protons and neutrons have identical mass?
What is Plum-Pudding model of the atom?
J.J Thomson proposed that an atom possesses a spherical shape (radius approximately 10-10m) in which the positive charge is uniformly distributed. The electrons are embedded into it in such a manner as to give the most stable electrostatic arrangement. This model is known as Plum-pudding model of the atom.
What did Rutherford's experiment on scattering of particles show for the first time?