My question is about Rutherford experiment when a gold foil is bombed by alpha particles. We know that at that time only two types of force were discovered, electric forces and gravitational. And also there was another phenomenon and force that could not be explained:
When two objects hit each other, each one exerts a force on the other. These two objects are neutral electrically so the repulsion that happens can not electrical. Besides gravitational force is always a form of attraction. So repulsion of the objects could not be explained those times.
Now lets get back to the Rutherford experiment. He monitored alpha particles and saw some of them were reflected as much as 180 degrees so he concluded that there must be a lump of positive charges!!
My question is that why that lump must be positive? It may be a lump of mass electrically neutral and positive and negative charges have been distributed uniformly inside the atom like the model J.J.Thomson suggested.
When two objects hit each other, each one exerts a force on the other. These two objects are neutral electrically so the repulsion that happens can not electrical. Besides gravitational force is always a form of attraction. So repulsion of the objects could not be explained those times.
Now lets get back to the Rutherford experiment. He monitored alpha particles and saw some of them were reflected as much as 180 degrees so he concluded that there must be a lump of positive charges!!
My question is that why that lump must be positive? It may be a lump of mass electrically neutral and positive and negative charges have been distributed uniformly inside the atom like the model J.J.Thomson suggested.