One such scientist, Ernest Rutherford, returned from helping the English track down German U-Boats to carry out one of the most important experiments in chemistry. The gold-foil experiment showed that the atom consists of a small, massive, positively charged nucleus with the negatively charged electrons being at a great distance from the centre.
Most of this planetary atom was open space and offered no resistance to the passage of the alpha particles. The concept of nuclear fission, which is the addition of two nuclei, was also soon developed. Concept Definition Study the primary definition of this concept, broken into general, basic, and advanced English definitions.
But luckily, Rutherford was a very thorough chemist, and he also thought, it might be interesting to detect whether particles came, not just here, he didn't just put a detector screen here, he put a detector screen that went all the way around.
The electrostatic force of attraction between electrons and nucleus was likened to the gravitational force of attraction between the revolving planets and the Sun.
But why was Rutherford expecting that to happen here?